Silje vs Thea
Silje and Thea compared on official birth-registration statistics and Namewise's recorded data. This page states what each name's record shows — it never picks a winner or scores one name against the other.
Head to head
Ranks are only compared within one published list and one year. Two ranks from different years, from a boys' and a girls' list, or from different registrars are not comparable, so they are not placed side by side.
Norway · Girls
In 2025, Silje was ranked #286 and Thea #50 among girls in Norway.
Silje and Thea over time
Higher on the chart is a stronger position. The scale is logarithmic, so the gap from #1 to #10 is drawn as large as the gap from #100 to #1,000.
Silje and Thea over time
Silje and Thea appear together in 1 published list, across 60 years of shared records. Silje held the stronger position in more years in 1 of them, Thea in 0.
The order between them changed and held in one of those lists — a change in that published list, never a claim that one name displaced the other.
Silje reached its own highest recorded position earlier in 1 of those lists, and Thea in none. Each position is a place inside its own list, so this compares when they peaked and never how high.
Counted list by list. Two names in the same published list are measured on the same scale in the same year, so those comparisons are real — but positions from different lists are not, so nothing here is combined into an overall standing.
How this pair is related
The relationship kinds these two qualify for, each under its own stated rule. Every one is drawn from a list they both appear in.
- One moved ahead of the other
In 1999, Thea moved ahead of Silje in Norway · Girls — #2 and #10 the year before became #9 and #6.
- Longest-running competitions
Silje and Thea were both ranked in Norway · Girls for 60 years, from 1966 to 2025, ending at #286 and #50.
List by list
Norway · Girls60 shared years, 1966–2025
Silje held the stronger position in 33 of those years, Thea in 27.
Highest recorded here: Silje #1 in 1982, Thea #1 in 2006.
The order changed in 1999: Thea moved ahead. In 1998 they stood at #2 and #10; by 1999 that had become #9 and #6.
Most recent shared year, 2025: Silje #286, Thea #50.
Two names moving past each other in a ranking is a fact about the ranking. Namewise does not claim one name displaced the other, that families chose between them, or that either influenced the other — none of that is in this data.
Where to go next
Comparisons that share a name, a rule or a published list with this one. Each is an existing comparison page with its own evidence — nothing here says these pairs are alike.
Other comparisons involving Silje
Pairs where Silje shares a published list with another name, each measured inside one registrar's own list.
- Silje vs Tuva
Over 53 shared years in Norway · Girls, Tuva rose about as far as Silje fell — from #161 and #549 in 1971 to #286 and #30 in 2025.
Silje · Tuva · 53 shared years, 1971–2025 · Mirrored each other
- Silje vs Amanda
Over 51 shared years in Norway · Girls, Amanda rose about as far as Silje fell — from #161 and #556 in 1971 to #286 and #52 in 2025.
Silje · Amanda · 51 shared years, 1971–2025 · Mirrored each other
- Silje vs Anette
Both reached their highest recorded position in Norway · Girls within 2 years — Silje #1 in 1982, Anette #5 in 1982.
Silje · Anette · 52 shared years, 1966–2024 · Peaked in the same years
- Silje vs Camilla
Both reached their highest recorded position in Norway · Girls within 2 years — Silje #1 in 1982, Camilla #2 in 1980.
Silje · Camilla · 60 shared years, 1966–2025 · Peaked in the same years
Other comparisons involving Thea
Pairs where Thea shares a published list with another name, each measured inside one registrar's own list.
- Thea vs Eva
Over 63 shared years in Norway · Girls, Thea rose about as far as Eva fell — from #380 and #9 in 1950 to #50 and #22 in 2025.
Thea · Eva · 63 shared years, 1950–2025 · Mirrored each other
- Thea vs Heidi
Over 63 shared years in Norway · Girls, Thea rose about as far as Heidi fell — from #380 and #232 in 1950 to #50 and #437 in 2025.
Thea · Heidi · 63 shared years, 1950–2025 · Mirrored each other
- Thea vs Kristine
Over 63 shared years in Norway · Girls, Thea rose about as far as Kristine fell — from #380 and #159 in 1950 to #50 and #244 in 2025.
Thea · Kristine · 63 shared years, 1950–2025 · Mirrored each other
- Thea vs Nina
Over 63 shared years in Norway · Girls, Thea rose about as far as Nina fell — from #380 and #103 in 1950 to #50 and #195 in 2025.
Thea · Nina · 63 shared years, 1950–2025 · Mirrored each other
Other pairs with the same kind of relationship
Pairs that qualify under the same rule as this one — one moved ahead of the other.
- Emily vs Amelia
In 2011, Amelia moved ahead of Emily in England and Wales · Girls — #3 and #5 the year before became #5 and #1.
Emily · Amelia · 30 shared years, 1996–2025 · One moved ahead of the other
- Sophie vs Amelia
In 2011, Amelia moved ahead of Sophie in England and Wales · Girls — #2 and #5 the year before became #6 and #1.
Sophie · Amelia · 30 shared years, 1996–2025 · One moved ahead of the other
- Sarah vs Angela
In 1974, Sarah moved ahead of Angela in New Zealand · Girls — #6 and #5 the year before became #1 and #6.
Sarah · Angela · 36 shared years, 1958–1998 · One moved ahead of the other
- Emma vs Aoife
In 2003, Emma moved ahead of Aoife in Republic of Ireland · Girls — #4 and #2 the year before became #1 and #3.
Emma · Aoife · 62 shared years, 1964–2025 · One moved ahead of the other
Other pairs from Norway lists
Pairs measured inside Norway's own published lists, where this pair's strongest relationship is also recorded. Positions in these lists are not comparable with another registrar's.
- Ingrid vs Wenche
In 1945 they stood at #27 and #22 in Norway · Girls, 5 places apart; by 2008 they were #6 and #621.
Ingrid · Wenche · 58 shared years, 1945–2008 · Started together, ended far apart
- Anna vs Torill
In 1945 they stood at #38 and #39 in Norway · Girls, 1 places apart; by 2004 they were #10 and #599.
Anna · Torill · 55 shared years, 1945–2004 · Started together, ended far apart
- Ingrid vs Vigdis
In 1945 they stood at #27 and #32 in Norway · Girls, 5 places apart; by 2006 they were #6 and #583.
Ingrid · Vigdis · 52 shared years, 1945–2006 · Started together, ended far apart
- Anna vs Vigdis
In 1945 they stood at #38 and #32 in Norway · Girls, 6 places apart; by 2006 they were #10 and #583.
Anna · Vigdis · 52 shared years, 1945–2006 · Started together, ended far apart
Other pairs ranked together in the 2020s
Pairs both ranked in the same published list at some point between 2020 and 2029.
- Grace vs Gemma
In 1996 they stood at #41 and #50 in England and Wales · Girls, 9 places apart; by 2025 they were #27 and #4867.
Grace · Gemma · 30 shared years, 1996–2025 · Started together, ended far apart
- Ella vs Gemma
In 1996 they stood at #56 and #50 in England and Wales · Girls, 6 places apart; by 2025 they were #46 and #4867.
Ella · Gemma · 30 shared years, 1996–2025 · Started together, ended far apart
- Jasmine vs Gemma
In 1996 they stood at #55 and #50 in England and Wales · Girls, 5 places apart; by 2025 they were #102 and #4867.
Jasmine · Gemma · 30 shared years, 1996–2025 · Started together, ended far apart
- Anna vs Gemma
In 1996 they stood at #47 and #50 in England and Wales · Girls, 3 places apart; by 2025 they were #142 and #4867.
Anna · Gemma · 30 shared years, 1996–2025 · Started together, ended far apart
Side by side
| Field | Silje | Thea |
|---|---|---|
| Record type | Official statistical record (evidence-only) | Editorially researched profile |
| Gender usage | female | female |
| Meaning | Not yet recorded | A short form of Dorothea, Theodora, Theresa and other similar-sounding Greek-rooted names. |
| Origin | Not yet recorded | Greek (via Germanic/Scandinavian transmission) |
| Pronunciation | /ˈteː.a/ | |
| Syllables | 2 | 1 |
| Common variants / nicknames | Not yet recorded | Not yet recorded |
| Recorded regional usage | Norway | New South Wales, Australia, England and Wales, Northern Ireland, Scotland, Republic of Ireland, Norway, New Zealand |
| Most recent popularity observation | Norway · Girls #286 (2025) | Norway · Girls #50 (2025) |
| Data Confidence | medium | medium |
What the data shows
- Thea has a recorded origin (Greek (via Germanic/Scandinavian transmission)); Silje does not have one recorded yet.
- Silje has 2 syllables, compared with 1 for Thea.
- A meaning is recorded for Thea; Silje doesn't have one written yet.
- Both names have recorded usage in NO.
How each name got here
Silje
Popularity journey
First recorded1966
First recorded at #542 among girls in Norway in 1966 — the earliest year that source publishes this name, not necessarily the earliest it was used.
Norway · Girls
Highest recorded1966–2025
Highest recorded position: #1 among girls in Norway, in 1982 (recorded 1966–2025).
Norway · Girls
Most recent2025
Most recently recorded at #286 among girls in Norway, in 2025.
Norway · Girls
Thea
Popularity journey
First recorded1950
First recorded at #380 among girls in Norway in 1950 — the earliest year that source publishes this name, not necessarily the earliest it was used.
Norway · Girls
Highest recorded1950–2025
Highest recorded position: #1 among girls in Norway, in 2006 (recorded 1950–2025).
Norway · Girls
Most recent2025
Most recently recorded at #66 among girls in England and Wales, in 2025.
England and Wales · Girls