Numbers 3:20

3:20 The sons of Merari by their families were Mahli and Mushi. These are the families of the Levites by their clans.

Numbers 36:11

36:11 For the daughters of Zelophehad – Mahlah, Tirzah, Hoglah, Milcah, and Noah – were married to the sons of their uncles. ¹ 

[36:11]  ¹ tn They married in the family as they were instructed. But the meaning of דּוֹד (dod) is not necessarily restricted to “uncle.”