Seddrick is of African origin, specifically from Nigeria and the Ivory Coast, where it's derived from the Yoruba name Shadrack. The name means 'righteous' or 'just'. Seddrick gained some popularity in the United States during the mid-20th century but has since become less common.
"Seddrick saw its peak popularity with 8 births in 1974 and again in 1991, but has remained steady since then with most years seeing around 6 births."