My last name - Beattie - is also in the "Bartholomew" nickname group along with Bates/Bateson.
Bartholomew means "son of Ptolemy", so the name is sort of "Ptolemy's son Bart's kid".
(Fun fact: Just to drive the Brits crazy, many families in the U.S with that surname (including mine) pronounce it "bee-AT-tee" instead of "bee-tee". God knows why. Maybe it's an attempt to get people to spell it correctly.)
Bartholomew means "son of Ptolemy", so the name is sort of "Ptolemy's son Bart's kid".
(Fun fact: Just to drive the Brits crazy, many families in the U.S with that surname (including mine) pronounce it "bee-AT-tee" instead of "bee-tee". God knows why. Maybe it's an attempt to get people to spell it correctly.)