The families - "The families of the Rechabites, the sons of Eliezer the son of Misco, the disciple of Jabez; he was Othniel, the son of Kenaz. And he was called Jabez, because in his council he instituted a school of disciples; they were called Tirathim, because in their hymns their voice was like trumpets; and Shimathim, because in hearing they lifted up their faces, i.e., in prayer; and Suchathim, because they were overshadowed by the Spirit of prophecy. These Salmaei were the children of Zipporah, who were numbered among the Levites who came from the stock of Moses, the master of Israel, whose righteousness profited them more than chariots and horses." - T. See on 1 Chronicles 4:9-10; (note).
Is the above explanation of Tirathites, Shimeathites, and Suchathites, the Targumist refers to the import of the Hebrew roots, whence these names are derived. See 1 Chronicles 4:10. In this chapter many names of cities are given as the names of men.
Kenites - It is remarkable that Kenites - people of a race quite distinct from the Israelites Genesis 15:19 - should be attached to, and, as it were, included in the descendants of Judah. It seems, however, that the friendly feeling between the two tribes - based on the conduct of the Kenites at the time of the Exodus Exodus 18:10-19; Numbers 10:29-32; 1 Samuel 15:6 - led to their intermixture and almost amalgamation with the Israelites, Kenite families not only dwelling among them but being actually regarded as of one blood with them.