Si vs Day

Baby Name Comparison — 2026

Si

Boy #20,580 Most Popular 1 Syllable

"God has heard"

Origin: Hebrew

Chinese Vietnamese Hebrew American

15 High Risk

{:type=>:rhyme, :severity=>:medium, :message=>"'Si' rhymes with 'pee'"}

Boy #20,203 Most Popular 1 Syllable

"daylight, the day"

Origin: Old English

English American British

✓ All Clear

Si Rank #20,580

Day Rank #20,203

Day is more popular, ranked #20203 vs #20580 for Si.

Is Si or Day more popular?

Day is more popular, ranked #20203 compared to Si at #20580 in the United States.

What do Si and Day mean?

Si means "God has heard" (Hebrew origin). Day means "daylight, the day" (Old English origin).

Are Si and Day boy or girl names?

Si is primarily a boy name. Day is primarily a boy name.