Middle English word rumblen comes from Proto-Germanic *raimōną, and later Middle English romen (To roam (move around somewhat indiscriminately).)

Detailed word origin of rumblen

Dictionary entry	Language	Definition
*raimōną	Proto-Germanic (gem-pro)
*rāmian	Old English (ang)
romen	Middle English (enm)	To roam (move around somewhat indiscriminately).
rummelyn	Middle English (enm)

Words with the same origin as rumblen