However,that'snotthepointasthesurnameisincorrect.YesI'mremovingallaoffthespacesinordertomakeapoint.
The problem isn't whether if it's turning up correctly in searches - the problem is that the name is WRONG. I find it VERY offensive (I mean this quite literally) that the surname isn't being written properly - as it has been for HUNDREDS of years. The only correct form of the surname is La Marca. It's not Lamarca, LaMarca (this name is NOT Scottish, which uses camel casing - Italian names do NOT use that), or anything else. Case in point, I recently had a problem with my state DMV refusing to recognize surnames that contain two (or more) words, although voter registration, and all other state and Federal agencies do recognize it as two words. I told them that their refusal was RACIST, and insulting to my cultural heritage. Well . . . they fixed it.
Egregious errors (for which no justification can be given except that the programmers who have permitted this to happen don't know what they're doing) such as this one have a way of becoming "fact" very, very quickly and displays gross ignorance on the part of many. Case in point - another one of my ancestors is Margaret Riegle. When her name was recorded, it was ALWAYS Margaret Riegle or Peggy Riegle. At one point, I was aware of MORE THAN 150 others across the web (that may be even higher now) who list her name as Margaret Peggy Riegel - they assign "Peggy" as her middle name, which is clearly is not. Peggy is a nickname for Margaret and nothing more. There are no sources, anywhere, the list her name as "Margaret Peggy."
Bottom line - names matter! Whether or not searches point at something is irrelevant if the information is wrong.