When you state that in Mexico you use two surnames, I presume you mean that the "mother" retains her "maiden" name, i.e. the name she had before she married? What name do the children use in Mexico? Do they use their father's surname as their surname? The mother is always entered with her "maiden" name in PAF and that is the record PAF retains. If she chooses to be known by something else, you could perhaps enter that in "Also known as" on the Individual Edit screen. If the children choose to use their mother's maiden name, or a hyphenated name (e.g. Smith-Jones), you would enter their surname as that, and PAF would retain that as their record. Hope this helps, but I would appreciate an explanation on just how names are used in Mexico (I'm way "down-under" in Australia - the land of the Olympics!).