三越 is the name of a department store. Three is the meaning of the first character and I get the meanings of surpass, cross over, move to, exceed, and Vietnam when I research the term. Is there a meaning for the two terms when combined?
The term Mitsukoshi has no direct English translation, the characters individually mean three and to overtake or surpass. This information was obtained from the Official Gazette of the United States Patent and Trademark Office: Trademarks