Borg

As a Danish and Norwegian surname, from various places derived from Old Norse borg (“stronghold”).

As a north/Low German surname, this is the Low German form of the surname Burg.

As a Jewish surname, from Yiddish בורג (burg, “credit”), from Middle High German borgen (“to lend, borrow”), from Old High German borgēn.

As a Maltese surname, from the noun borġ (“tower, stronghold”), distantly related to the first two senses above.

From the Star Trek franchise, in which the Borg are a cyborg race intent on converting all other life into their own kind; apparently a clipping of cyborg, from cybernetic + organism.