NASB 1995
and they were for the sons of Aaron, one of the families of the Kohathites, of the sons of Levi, for the lot was theirs first.

American Standard Version
and they were for the children of Aaron, of the families of the Kohathites, who were of the children of Levi; for theirs was the first lot.

Berean Study Bible
to the descendants of Aaron from the Kohathite clans of the Levites, because the first lot fell to them:

Douay-Rheims Bible
To the sons of Aaron, of the families of Caath of the race of Levi (for the first lot came out for them)

English Revised Version
and they were for the children of Aaron, of the families of the Kohathites, who were of the children of Levi: for theirs was the first lot.

King James Bible
Which the children of Aaron, being of the families of the Kohathites, who were of the children of Levi, had: for theirs was the first lot.

World English Bible
and they were for the children of Aaron, of the families of the Kohathites, who were of the children of Levi; for theirs was the first lot.

Young's Literal Translation
and they are for the sons of Aaron, of the families of the Kohathite, of the sons of Levi, for theirs hath been the first lot;

Joshua 21:10 Additional Translations ...