Where does “Hillary” come from?

Hillary (English) comes from Latin Hilarius, from Latin hilaris, from Ancient Greek ἱλαρός, from Ancient Greek ἵλαος, from Proto-Indo-European sēlh₂- — to calm, quiet, be favourable.

Ancestry of “Hillary”, step by step

Step	Language	Word	Meaning
1	Latin	Hilarius	cheerful, happy; Latin name of Saint Hilary of...
2	Latin	hilaris	cheerful, lively, light-hearted, merry
3	Ancient Greek	ἱλαρός	cheerful, merry, joyous, glad, happy
4	Ancient Greek	ἵλαος	propitious, gracious, merciful; kind, mild,...
5	Proto-Indo-European	sēlh₂-	to calm, quiet, be favourable

Every word from Proto-Indo-European sēlh₂- →