John Gill Commentary 1 Chronicles 2:35

"And Sheshan gave his daughter to Jarha his servant to wife; and she bare him Attai." — 1 Chronicles 2:35 (ASV)

And Sheshan gave his daughter to Jarha his servant to wife ,
&c.] Having first given him his freedom, as the Targum premises; this daughter seems to be Ahlai, (1 Chronicles 2:31) which receives confirmation from Zabad, one of the descendants of this man, (1 Chronicles 2:36) , being said to be the son of Ahlai, (1 Chronicles 11:41) , that is, great-grandson:

and she bare him Attai ;
the genealogy of whose descendants is given to the end of (1 Chronicles 2:41) , of whom no mention is made elsewhere, but of Zabad, as before observed; and, according to the Jews, it is given for the sake of Ishmael, the son of Nethaniah the son of Elishama, the last person mentioned in this genealogy; which Ishmael slew Gedaliah governor of Jerusalem, and is said to be of the seed royal, (Jeremiah 41:1) .