Namewise

Peaked in the same years

Both names reached their highest recorded position in the same list within two years of each other.

1200 pairs, drawn from the 2,573 names with a recorded popularity standing (common, familiar, uncommon). Every one comes from a single published list, where both names were measured on the same scale, in the same year, by the same registrar — so each is a fact about that ranking rather than a similarity judgement, and never a claim that one name displaced the other.