Off Topic: when I came across the journalist/writer, Anne Cadwallader, I used to wonder about the origin of her surname. After reading this comment, I finally decide to look it up and found that her About page at https://www.annecadwallader.com/about explains it well:
> “Cadwallader” comes from the Welsh/Briton from Cadwaladr, meaning “battle leader” or “warrior” (cad ”battle” + gwaladr “leader/ruler”). The name dates back to the 7th century, notably held by King Cadwaladr of Gwynedd.
> “Cadwallader” comes from the Welsh/Briton from Cadwaladr, meaning “battle leader” or “warrior” (cad ”battle” + gwaladr “leader/ruler”). The name dates back to the 7th century, notably held by King Cadwaladr of Gwynedd.