John Gill Commentary Numbers 36:1

"And the heads of the fathers` [houses] of the family of the children of Gilead, the son of Machir, the son of Manasseh, of the families of the sons of Joseph, came near, and spake before Moses, and before the princes, the heads of the fathers` [houses] of the children of Israel:" — Numbers 36:1 (ASV)

And the chief fathers of the families of the children of
Gilead
The princes, as Aben Ezra; so the Septuagint version, which was the tribe of Manasseh, whose grandson Gilead was, as follows:

the son of Machir, the son of Manasseh of the families of the sons of
Joseph, came near ;
to the house of judgment, as the Targum of Jonathan, the sanhedrim or court of judicature, consisting of the following persons:

and spoke before Moses ;
the Septuagint version adds, "and before Eleazar the priest", as in (Numbers 27:2) (32:2)

and before the princes, the chief fathers of the children of Israel :
the princes of the several tribes; or it may be rather the seventy elders.