The name Bender could be a Jewish surname, but it's hard to be sure with that information alone. Jews' names originally took the form of a given name followed by "son of" (ben) or "daughter of" (bat or bas) and then the father's or mother's given name. During the Middle Ages, government authorities in Europe compelled Jews to take family names so that they could be counted in a census for purposes of taxation. Depending on the country, different customs affected how the last name was chosen (or in some cases imposed). Many Jewish surnames, especially those that resemble Slavic or German names, could also belong to non-Jews. In addition, Jewish families who emigrated to Israel often changed their European names. Bender could have been a variation of some other name the family had before, such as Brodner.
Yes, he is...
Cameron Bender's birth name is Cameron Frederick Bender.
Don Bender's birth name is Donald Eugene Bender.
Lawrence Bender's birth name is Lawrence Kirk Bender.
William Bender's birth name is William H. Bender.
Russ Bender's birth name is Bender Jr., Russell Richard.
Big Chief Bender's birth name is Charles Albert Bender.
Eva Bender's birth name is Eva Abrahamson.
Helga Bender's birth name is Helga Hausen.
James Bender's birth name is Sidney Olitsky.
Lenore Bender's birth name is Lenore Lynn.
Bender the robot's full name is "Bender Bending Rodríguez."