Delbert \d(e)-lbe-rt, del-bert\ as a boy's name is pronounced DEL-bert. It is of Old English origin, and the meaning of Delbert is "day-bright". Also possibly a variant of Albert or Adelbert (Old English) "noble, bright, famous". The variant Dilbert is the title of a popular comic strip.
For more information, see also the related name Dell.
A baby name that sounds like Delbert is Talbert.