Sindarin name of Gandalf, translated “Grey Pilgrim” (LotR/670) or “Grey Wanderer” (LotR/827). This name is a combination of mith “grey” and randir “wanderer, pilgrim” (SA/mith, PE17/60, VT42/13).
Conceptual Development: When this name first appeared in Lord of the Rings drafts from the 1940s, it was already N. Mithrandir with the translations given above (TI/251).
mith (“grey”) + ran (“wander, stray”) + dîr (“man, adult male”)