מַחְלוֹן

Ruth 1:2 מַחְל֤וֹן [was] Mahlon

The man’s name was Elimelech, his wife’s name was Naomi, and the names of his two sons were Mahlon and Chilion. They were Ephrathites from Bethlehem in Judah, and they entered the land of Moab and settled there.

Ruth 1:5 מַחְל֣וֹן Mahlon

both Mahlon and Chilion also died, and Naomi was left without her two sons and without her husband.

Ruth 4:9 וּמַחְל֑וֹן and Mahlon

At this, Boaz said to the elders and all the people, “You are witnesses today that I am buying from Naomi all that belonged to Elimelech, Chilion, and Mahlon.

Here: Ruth's dead husband (4:10). Placing him last puts his name right next to the following sentence, where Boaz names 'Ruth the Moabitess, Mahlon's wife.'

Ruth 4:10 מַחְל֜וֹן Mahlon

Moreover, I have acquired Ruth the Moabitess, Mahlon’s widow, as my wife, to raise up the name of the deceased through his inheritance, so that his name will not disappear from among his brothers or from the gate of his home. You are witnesses today.”