The name Keller is a boy's name of German origin meaning "cellar master". Keller and discussed in our forums with posts like "Create a Class".
From the experts:
Keller is a German surname that originated as an occupational name for a cellar or store master, which seems to be the background of several of the most stylish new German names for boys. One of the stylish new two-syllable -er ending names for boys, Keller is rising up the ranks heading for the Top 1000. It may be an honorific for Helen Keller.