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
Mats	-	Swedish, Norwegian
Natan	-	Hebrew, Biblical Hebrew
Eugenius	-	Ancient Greek (Latinized)
Ties	-	Dutch
Jernej	-	Slovene
Afonso	a-FAWN-saw (Galician)	Portuguese, Galician