I believe that for a first time UK passport application, a 'countersignatory' (a professional person, doctor, minister, etc, - but see the list on the Government website) must confirm that they know you and can vouch for you. Check with the Passport Office.
Yes, they can if they have a passport. My neice was 15 when she traveled alone from and back to the US
ur neice-in-law i think
She would be your aunt. The neice's kids will be your second cousins.
Weird Al is an only child, nor is Jessiej a neice by marriage.
feminine
You are your neice's aunt, your neice's children's great aunt, and your neice's grandchildren's great great aunt
Spanish for "neice"
Neice
A neice.
You would be a neice or nephew, neice if a girl and nephew if a guy.
neice