1 Chronicles Chapter 12

Those who came to David at Ziklag, while he was hiding from Saul are named.  They were Benjamites, as Saul was, yet they came to David.  They could use bows and slings with either hand.

Those from the tribe of Gad are named.  There is this verse about them:

14 These Gadites were officers of the army; the least was a match for a hundred men and the greatest for a thousand. [1Ch 12:14 ESV]

These are some pretty stout guys...

Then there is a detailing of how many soldiers from each tribe showed up at Hebron to serve David.  There is this verse:

32 Of Issachar, men who had understanding of the times, to know what Israel ought to do, 200 chiefs, and all their kinsmen under their command. [1Ch 12:32 ESV]