🔼The name Mushi in the Bible
We don't know much about this Mushi, but apparently he fared well enough to spawn his own sub-clan, namely the Mushites (Numbers 3:33; Note that the ethnonym Mushite (מושי) is spelled the same as the name Mushi itself.).
Mushi's brother was named Mahli, and Mushi apparently liked that name so much that he gave it to his son (1 Chronicles 24:30).
🔼Etymology of the name Mushi
The name Mushi comes from either of the two verbs מוש:
The letter י (yod) upon which our name ends, may either create an adjective (touchy), a possessive form (my departure), or may be a remnant of the Tetragrammaton יהוה, YHWH, or Yahweh.
For a meaning of the name Mushi, NOBSE Study Bible Name List appears to derive our name from the verb מוש, (mush I), meaning to depart or remove, and reads Drawn Out.
Alfred Jones (Dictionary of Old Testament Proper Names) insists that the verb מוש (mush II) can also mean to prove (by feeling) and proposes Proved Of The Lord.
BDB Theological Dictionary does not offer an interpretation of the name Mushi but does list it under the verb מוש (mush II), meaning depart or remove.