The father of an acquaintance of mine, still a child at the time, migrated from Spain to Argentina with his uncle. On arrival, the uncle was asked for his name. "Guzman y Gomez", he replied, meaning himself (Guzman) and his nephew (Gomez).

End result: both father, uncle and all their offspring now have "Guzman y Gomez" as their last name.

(Yes, this is a pseudonym. No burrito for you.)