5 occurrences in 5 dictionaries
Reference: Jahdai
Easton
grasper, a descendant of Caleb, of the family of Hezron (1Ch 2:47).
Fausets
Abruptly named in Caleb's genealogy (1Ch 2:47).
Hastings
A Calebite (1Ch 2:47).
Morish
Jah'dai
One in the family of Caleb. 1Ch 2:47.
Smith
Jah'da-i
(whom Jehovah directs), a man who appears to be thrust abruptly into the genealogy of Caleb, as the father of six sons.