I mean, I listed there the etymology for English days of the week: Sun, Moon, Tyr, Woden, Thor, Freya, Saturn. Tuesday through Friday are old Germanic gods. Saturday comes from Rome, although according to Wikipedia, not from the god... Well, part of those obviously matches for German: Montag, Sonntag, Freitag... You could arguably also say Donnerstag (Thor being the god of thunder).