Twins

A woman has twins and gives them up for adoption.
One of them goes to a family in Egypt and is named "Ahmal."
The other goes to a family in Spain; they name him "Juan."
Years later, Juan sends a picture of himself to his birth mother.
Upon receiving the picture, she tells her husband that she wishes
she also had a picture of Ahmal. Her husband responds,
They're twins! If you've seen Juan, you've seen Ahmal."