[Avodah] How to become a kohein

[elazar teitz via Avodah]

The Netziv, in B'midbar 26:5, writes that the sh'vatim undoubtedly had
children in Mitzrayim, but they were not given "family names" because
they were not born in EY; rather, they were subsumed into the existing
families of that shevet. I would imagine that the same would be true of
the non-kohanim: they were attached to assorted mishmaros of Levi'im,
perhaps on a basis of geographical proximity.