14 year old Cavan Sullivan has been named in a Philadelphia Union first team squad. He signed for them at the same time as agreeing to sign for Man City when he turns 18.
His brother Quinn is 20 and already plays for Philadelphia Union. However, he has younger twin brothers - Ronan and Declan.
In spite of the names, it doesn't look like Cavan is eligible. His grandfather, Larry, was Head Coach at Villanova University and was born in Philadelphia. The only hope is if Larry married an Irish born woman - she is named Kathleen...
https://www.backheeled.com/meet-the-...soccer-family/
The Irish Americans do retain their Irishness longer than most, and definitely longer than the FIFA rules permit.