Namewise

Monica vs Thea

Monica and Theacompared 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 2017, Monica was ranked #542 and Thea #10 among girls in Norway.

  • Scotland · Girls

    In 2024, Monica was ranked #790 and Thea #65 among girls in Scotland.

  • England and Wales · Girls

    In 2025, Monica was ranked #1229 and Thea #66 among girls in England and Wales.

  • Republic of Ireland · Girls

    In 2023, Monica was ranked #727 and Thea #168 among girls in Republic of Ireland.

  • Northern Ireland · Girls

    In 2004, Monica was ranked #372 and Thea #372 among girls in Northern Ireland.

Monica and Thea over time

Monica and Thea appear together in 3 published lists, across 104 years of shared records. Thea held the stronger position in more years in 2 of them, Monica in 1.

The order between them changed and held in 3 of those lists — a change in that published list, never a claim that one name displaced the other.

Monica reached its own highest recorded position earlier in 3 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 took the other's place near the top

    In Norway · Girls, Thea moved into the top 50 at #44 in 1990 as Monica fell out of it to #62, having been #47 the year before.

  • One moved ahead of the other

    In 1990, Thea moved ahead of Monica in Norway · Girls — #47 and #61 the year before became #62 and #44.

  • Repeatedly exchanged positions

    Monica and Thea changed places 5 times in Republic of Ireland · Girls between 1993 and 2023, ending at #727 and #168.

  • Mirrored each other

    Over 52 shared years in Norway · Girls, Thea rose about as far as Monica fell — from #236 and #380 in 1950 to #542 and #10 in 2017.

  • Longest-running competitions

    Monica and Thea were both ranked in England and Wales · Girls for 30 years, from 1996 to 2025, ending at #1229 and #66.

List by list

  • Norway · Girls52 shared years, 1950–2017

    Monica held the stronger position in 27 of those years, Thea in 25.

    Highest recorded here: Monica #3 in 1971, Thea #1 in 2006.

    The order changed in 1990: Thea moved ahead. In 1989 they stood at #47 and #61; by 1990 that had become #62 and #44.

    Most recent shared year, 2017: Monica #542, Thea #10.

  • England and Wales · Girls30 shared years, 1996–2025

    Monica held the stronger position in 3 of those years, Thea in 27.

    Highest recorded here: Monica #274 in 1997, Thea #46 in 2019.

    The order changed in 1999: Thea moved ahead. In 1998 they stood at #278 and #336; by 1999 that had become #415 and #346.

    Most recent shared year, 2025: Monica #1229, Thea #66.

  • Republic of Ireland · Girls22 shared years, 1993–2023

    Monica held the stronger position in 6 of those years, Thea in 15.

    Highest recorded here: Monica #286 in 1993, Thea #168 in 2023.

    The order changed in 2004: Thea moved ahead. In 2003 they stood at #490 and #559; by 2004 that had become #370 and #340.

    Most recent shared year, 2023: Monica #727, Thea #168.

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 Monica

Pairs where Monica shares a published list with another name, each measured inside one registrar's own list.

Other comparisons involving Thea

Pairs where Thea shares a published list with another name, each measured inside one registrar's own list.

Other pairs with the same kind of relationship

Pairs that qualify under the same rule as this one — mirrored each other.

All mirrored each 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.

Norway overview→

Other pairs ranked together in the 2010s

Pairs both ranked in the same published list at some point between 2010 and 2019.

The 2010s across all registrars→

Side by side

Side-by-side comparison of Monica, Thea
FieldMonicaThea
Record typeEditorially researched profileEditorially researched profile
Gender usagefemalefemale
MeaningPrecise meaning uncertain — most likely of Berber or Phoenician origin; since the Middle Ages popularly associated with Latin 'moneo' ('to advise') and Greek 'monos' ('one, single'). Borne by the 4th-century North African saint who was mother of Saint Augustine.A short form of Dorothea, Theodora, Theresa and other similar-sounding Greek-rooted names.
OriginUncertain (Berber or Phoenician)Greek (via Germanic/Scandinavian transmission)
Pronunciation/ˈmoː.ni.kaː//ˈteː.a/
Syllables31
Common variants / nicknamesMonika, MonaNot yet recorded
Recorded regional usageAU-NSW, GB-ENW, GB-NIR, GB-SCT, IE, NO, NZAU-NSW, GB-ENW, GB-NIR, GB-SCT, IE, NO, NZ
Most recent popularity observationEngland and Wales · Girls #1229 (2025)Norway · Girls #50 (2025)
Pronunciation clarity (demonstration score)90/10090/100
Spelling simplicity (demonstration score)88/10095/100
International familiarity (demonstration score)100/100100/100
Data Confidencehighmedium

What the data shows

  • Monica is recorded with a Uncertain (Berber or Phoenician) origin, while Thea is recorded with a Greek (via Germanic/Scandinavian transmission) origin.
  • Monica has 3 syllables, compared with 1 for Thea.
  • Monica's recorded meaning differs from Thea's — see the table above for each.
  • Both names have recorded usage in AU-NSW, GB-ENW, GB-NIR, GB-SCT, IE, NO, NZ.
  • The available evidence gives Monica a "high" Data Confidence level and Thea a "medium" level — this reflects how complete and corroborated the underlying evidence is, not a judgement of either name.

How each name got here

Monica

Popularity journey

  1. First recorded1946

    First recorded at #315 among girls in Norway in 1946 — the earliest year that source publishes this name, not necessarily the earliest it was used.

    Norway · Girls

  2. Highest recorded1946–2017

    Highest recorded position: #3 among girls in Norway, in 1971 (recorded 1946–2017).

    Norway · Girls

  3. Most recent2025

    Most recently recorded at #1229 among girls in England and Wales, in 2025.

    England and Wales · Girls

Thea

Popularity journey

  1. 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

  2. Highest recorded1950–2025

    Highest recorded position: #1 among girls in Norway, in 2006 (recorded 1950–2025).

    Norway · Girls

  3. Most recent2025

    Most recently recorded at #66 among girls in England and Wales, in 2025.

    England and Wales · Girls