What is the deal with this dude having two last names? His race bib said Gomes, but elsewhere he is listed as dos Santos. Or is it two first names? Marilson Gomes....Gomes Dos Santos....why can't people pick one name (no hyphen!) and just go with it?
Armstrong's bib said, "Lance" Are you confused about that one as well?
It is standard in Spanish (and, I'm assuming, Portuguese) speaking countries for people to have two surnames - their mother's and their father's. The father's comes first and is considered the "primary" surname, i.e. if they had to fill out a government form asking for only one "last name" it would be that one. It gets even more complicated for women when they get married and choose to add their husband's name to the mix, but I won't go into that.
People listing Gomes's surname as dos Santos are incorrect, but the mistake is very understandable as the American naming system places the true surname last.
So, he won't just "pick one name...and just go with it" because his language and culture don't work that way.