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
Ludwig	LOOT-vikh, LOOT-vik	German
Krunoslav	-	Croatian
Patricie	-	Czech
Yunus	-	Arabic, Turkish
Mphatso	MPAH-tso	Southern African, Chewa
Janetta	[dʒə'netə]