[falsedan]

First names, too, see Valērija/Valēris in Latvian (male names -s, female names -a). Same for family names.

After we were married, my wife's family name changed to 'match' my non-Latvian name, and our son got a different family name on his LV passport. e.g.

    John Smith <-> Jana Smitha
                |
                v
    Josefs Smiths/Joseph Smith

We use the LV passports for primary ID, which sometimes causes some confusion when setting up family accouts etc. with non-passport-control staff.