Strong's #1424: Gadiy (pronounced gaw-dee')
 from 1409; fortunate; Gadi, an Israelite:--Gadi.
Brown-Driver-Briggs Hebrew Lexicon:
 ּ 
  gâdı̂y 
 
 Gadi = "my fortune" 
 1) the Gadite father of Menahem, a king of Israel
 
  Part of Speech: noun proper masculine
Relation: from H1409
Usage:
This word is used 2 times:
2 Kings 15:14: "For Menahem the son  of Gadi went up from Tirzah, and came to Samaria,"
2 Kings 15:17: "of Judah began Menahem the son  of Gadi to reign over Israel, and reigned ten"