What are the days of week in Welsh and what do words mean?

Here are the days of the week in Welsh, along with their meanings:

* Dydd Llun (pronounced "duth loon") - Monday - "Day of the Moon"

* Dydd Mawrth (pronounced "duth marth") - Tuesday - "Day of Mars" (the Roman god of war)

* Dydd Mercher (pronounced "duth merch-er") - Wednesday - "Day of Mercury" (the Roman messenger god)

* Dydd Iau (pronounced "duth yow") - Thursday - "Day of Jupiter" (the Roman king of the gods)

* Dydd Gwener (pronounced "duth gwen-er") - Friday - "Day of Venus" (the Roman goddess of love)

* Dydd Sadwrn (pronounced "duth sad-urn") - Saturday - "Day of Saturn" (the Roman god of agriculture)

* Dydd Sul (pronounced "duth sool") - Sunday - "Day of the Sun"

As you can see, the Welsh names for the days of the week are very similar to the English names, reflecting their shared Roman and Germanic roots. The Welsh language retained the original pagan references to the planets and gods.