Do you know families where the names all start with the same letter?

my best friend's name is Ayla, she has an older brother, Austin, and an older sister, Ashlee. Plus younger brothers Andrew, Adam,and Aiden, and little sisters, Aimy and Alli. Her mom's pregnant with twins Alana/Andrea or Aaron/Ashton or Alana/Aaron. I get tongue-tied when i go over to their house. why do people do this?