|Easton's Bible Dictionary|
Sickly, the elder of Elimelech the Bethlehemite's two sons by Naomi. He married Ruth and died childless (Ruth 1:2, 5; 4:9, 10), in the land of Moab.
Int. Standard Bible Encyclopedia
ma'-lon (machlon, "invalid"): Ruth's first husband (Ruth 12, 5; 4:9, 10). In the latter passage is further evidence of the unwillingness to allow a family connection or inheritance to drop (see MAHLAH; MAHLI). Note that David's descent and that of his "Greater Son" come through Ruth and Boaz (Ruth 4:22).
Mahlon (4 Occurrences)
Ruth 1:2 The name of the man was Elimelech, and the name of his wife Naomi, and the name of his two sons Mahlon and Chilion, Ephrathites of Bethlehem Judah. They came into the country of Moab, and continued there. (WEB KJV JPS ASV BBE DBY WBS YLT NAS RSV NIV)
Ruth 1:5 Mahlon and Chilion both died, and the woman was bereaved of her two children and of her husband. (WEB KJV JPS ASV BBE DBY WBS YLT NAS RSV NIV)
Ruth 4:9 Boaz said to the elders, and to all the people, "You are witnesses this day, that I have bought all that was Elimelech's, and all that was Chilion's and Mahlon's, from the hand of Naomi. (WEB KJV JPS ASV BBE DBY WBS YLT NAS RSV NIV)
Ruth 4:10 Moreover Ruth the Moabitess, the wife of Mahlon, I have purchased to be my wife, to raise up the name of the dead on his inheritance, that the name of the dead not be cut off from among his brothers, and from the gate of his place. You are witnesses this day." (WEB KJV JPS ASV BBE DBY WBS YLT NAS RSV NIV)