Final answer:
The names of English weekdays originate mostly from Norse mythology, with additional influence from the Roman calendar.
Step-by-step explanation:
In English, the names of the days of the week are derived from Norse mythology and Ancient Roman religion. This reflects both the cultural influence of the Norse which honored barbarian gods such as Tieu, Woden, Thor, and Frija and Roman practices. The intermingling of these influences is evident as we see days like Sunday and Monday named after celestial bodies, Wednesday after Odin (Woden), Thursday after Thor, and so on. The Christian missionaries' pragmatic approach to conversion allowed for the integration of pagan elements into Christian practice, which included keeping the traditional Norse names of days in English speaking regions.