Final answer:
Ron Weasley's immediate family is entirely composed of magical individuals, with all of them having occupations within the wizarding world; hence, there is no Muggle family member nor Muggle occupation mentioned.
Step-by-step explanation:
In the Harry Potter series, all members of Ron Weasley's immediate family are magical; therefore, there is no Muggle in his immediate family. The Weasley family is known for being pure-blood, meaning all family members have magical ancestry.
However, if we broaden the scope beyond Ron's immediate family, there are relatives who have married Muggles or are themselves Muggle-born, but these are not directly mentioned within the core Weasley family circle. Moreover, the Weasley family members who do work have occupations within the wizarding world, not as Muggles. Furthermore, Arthur Weasley, Ron's father, is specifically fascinated by Muggle artifacts, although he is not a Muggle himself.
Learn more about Ron Weasley's Family