It's both. In English, it uses Germanic gods for all but Saturday. French uses the Roman names (Latin etymology instead of Germanic). Sunday and Monday exist in both (with different names for Sun and Moon), and Saturday in Germanic languages is usually not related to a deity (it varies by region though). In English we get a nice mix of gods because we have both Germanic and Latin roots.

Also, to convert Proto-Germanic to Old West Norse, Woden = Odin, Tor = Thor, Friga = Frigg/Freyja (the names got mixed up in etymology, they might be the same goddess), and Tiw/Tiwar = Tyr.