(I Chronicles 4:5) "And Ashchur, the father of Tekoa, had two wives, Chelah and Na'arah." Ashchur is Calev. Why was he called "Ashchur"? Because his face was "blackened" (hushcharu") with fasting. "the father" — He was like a father to her (Miriam).
"Tekoa" — He "pegged" (taka) his heart to his father in heaven. "two wives" — Miriam, who became to him like "two wives." "Chelah and Na'arah": At first she was sick (cholah), and then she "awakened" (na'arah). (Ibid. 7) "And the sons of Chelah were Tzereth, Tzochar, and Ethnan": Tzereth — she became a "vexation" (tzarah) to her co-wife, (who envied her). Tzochar — Her face was resplendent as mid-day (tzoharayim). "and Ethnan" — Anyone who saw her brought an "exchange" (for cohabitation) to his wife. (Ibid. 8) "And Kotz begot Anuv and Hatzovevah": "Kotz" is Calev, who "spurned" (katzath) the counsel of the spies.
"Anuv" — he generated good in the bringing of the grape cluster (viz. Bamidbar 13:23) for if not for Calev they would not have brought it. "and Hatzovevah" — he did the will (tzivyon) of the Holy One blessed be He. "and the families of Acharchel the son of Charum. "and the families of Acharchel" — This is Miriam, viz. (Shemot 15:20) "and all the women went out after ("achar") her (Miriam) with timbrels and dances." "and the families" — He (Calev) merited establishing families from her. "the son of Charum" — This is Yocheved, of whom (the Cohanim) it is written (Bamidbar 18:14) "Every devoted thing ("cherem") in Israel shall be yours," (the Cohanim - Levites descending from Yocheved).
Variantly: This ("Charum") is Miriam from whom there issued forth David, whose kingdom was exalted ("romem") by the Holy One Blessed be He, viz. (I Samuel 2:10) "And He will give strength to His king and He will exalt the horn of His anointed one." We find, then, that David came from the descendants of Miriam — whence we derive "One who draws near (to Israel) is drawn near by Heaven."