9BabyNames Baby names with meanings & US popularity data Italiano

Sibling Name Match Calculator

Enter any two baby names to see how well they work as a sibling pair. This editorial comparison scores 6 features: alliteration, final letter, length, letter overlap, cultural origin, and popularity-era overlap. Out of 100.

How the score works

The total compatibility score is summed from 6 weighted signals (max 100):

  • Same starting letter (18 pts) (shared written initial)
  • Same final letter (15 pts) (spelling only; sounds can differ)
  • Length proximity (12 pts max, 8 if differ by 1, 4 if by 2)
  • Letter overlap (15 pts max, scaled by % shared unique letters)
  • Same cultural origin (20 pts) — Hebrew + Hebrew, Spanish + Spanish, etc.
  • Popularity-era overlap (20 pts max) — both in SSA top 200 the same years (1980+)

The weights are editorial choices for comparing name ideas. Our sibling-name ideas report explains the limits of annual popularity data. SSA annual name files do not link children to households. Two names appearing in the same year do not establish that they belong to siblings.

Note: This score is an editorial comparison aid. It has not been validated against real sibling pairs or family preferences. The first-letter and final-letter checks inspect spelling, not speech. A low score can still describe two names you like. The origin signal compares catalog labels exactly; a missing or differently worded label gives zero points and does not establish unrelated origins. Popularity overlap describes calendar years, without identifying families. It uses each catalog entry’s recorded sex where available; unisex or unknown entries can use either SSA sex list.

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