Half orphan 

The condition of having only 1 living parent.
Sometimes shortened to harphan.

Me: Ever since my dad died I've been a harphan.
Girlfriend: That's really sad to hear. It must be really tough being a half orphan

Half orphan by Just one more cuddle... August 22, 2023

half-orphan 

A person, especially a child, whom only one of his/her parents is around/alive.

Jame's father passed away a few days ago. People is starting to call him half-orphan.

half-orphan by WickedDK December 5, 2018