Matthew Poole and continuators on 1 Chronicles 7:15

15 And Machir took to wise the sister of Huppim, and Shuppim, whose sisters name was Maachah) and the name of the second was Zelophehad: and Zelophehad had daughters .

Which Word is here fitly understood out of the following Clause, where it is expressed, and she is called Maachah, who also is called the wife of Machir, v. 16.

Of the second Son or Grandson of Machir; for so Zelophehad was, Numb. 26. 29, &c. Or, Zelophehad is here called the second, because he was the younger Brother of Ashriel, who was the eldest Son of Hepher, the Son of Gilead, the Son of Machir.

i. e. Onely Daughters, and no Sons.