Tiffany is an 8-year old girl that ALF meets at the hospital when he is accidentally given away to her as a toy by Mr. Foley. She initially calls him "Amanda," but ALF later reveals his true identity when she tries to dress him up like a girl.
Tiffany suffers from a terminal illness and is not expected to survive another year.
When AF helps Denise deliver her baby, he suggests the name Tiffany.