surname Ta
Depicts speech flowing out of the mouth (曰) like water (水). Based on the original meaning "mouth like a torrent, speaking a lot". The meaning later expanded to "repeated", "crowded", "join", and "unite".
《說文》：“沓，語多沓沓也。从水，从曰。遼東有沓縣。”
mouth like a torrent, speaking a lot