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
Joanne	[dʒəu'æn]
Adalberht	-	Ancient Germanic
Hyacinthus	-	Greek Mythology (Latinized), Ancient Greek (Latinized)
Cochran	['kɔkən]
Venyamin	vye-nee-ah-MEEN, vee-nee-ah-MEEN	Russian
Pernilla	-	Swedish