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
Fadila	-	Arabic
FÉLix	FE-leeks (Portuguese)	French, Spanish, Portuguese
Radzimierz	rah-JEEM-yesh	Polish (Rare)
Kuzma	kooz-MAH	Russian
Ala Al-Din	-	Arabic
Terenti	-	Georgian, Russian