be in (one's) blood

To be innate, as of a skill or quality. All of my relatives are doctors—medical prowess is just in our blood.

Name	Pronounced	Usage
Mirella	mee-REL-lah	Italian
AvguŠTin	-	Slovene
Ochieng	-	Eastern African, Luo
Daffodil	DAF-ə-dil	English (Rare)
Hilarion	-	Ancient Greek
Akihito	[æki'hi:təu]