John Gill Commentary 1 Chronicles 2:27

"And the sons of Ram the first-born of Jerahmeel were Maaz, and Jamin, and Eker." — 1 Chronicles 2:27 (ASV)

And the sons of Ram the firstborn of Jerahmeel
By his first wife:

were Maaz, and Jamin, and Eker ;
of whom no other notice is taken; perhaps they left no children.