Ar fy mhen fy hun

Ar fy mhen fy hun is a phrase in Welsh which means 'on my own/by myself'. If you look closely, you will see that the word pen is placed between two pronouns, ar fy mhen fy hun.

When this phrase is used in other contexts to refer to another person or to other people, these pronouns must correspond accordingly, e.g.

Rydw i ar fy mhen fy hun. I am on my own.
Roeddet ti ar dy ben dy hun. You were on your own.
Bydd e/o ar ei ben ei hun. He will be on his own.
Mae hi ar ei phen ei hun. She is on her own.
Byddwn ni ar ein pen ein hunain. We will be on our own.
Rydych chi ar eich pen eich hunain. You are on your own.
Maen nhw ar eu pen eu hunain. They are on their own.