Biography of Seraiah

1 Chronicles 4

13 The sons of Kenaz: Othniel and Seraiah. The sons of Othniel: Hathath and Meonothai.

14 Meonothai was the father of Ophrah. Seraiah was the father of Joab, the father of Ge Harashim. It was called this because its people were craftsmen.

Ge Harashim means valley of craftsmen

From Wikipedia

Seraiah or Sraya (שְׂרָיָה) "Soldier/Prince of/is the LORD"