People : Hugh Costello to Jillian Costello
Humphrey Costello 2 people
Ian Costello 7 people
Ida Costello 6 people
Ilyse Costello 2 people
Irene Costello 9 people
Irma Costello 2 people
Ivana Costello 2 people
Ivona Costello 2 people
Ivye Costello 2 people
Jack Costello 11 people
Jackie Costello 3 people
Jaclyn Costello 7 people
Jacob Costello 5 people
Jacqueline Costello 12 people
Jaime Costello 3 people
Jake Costello 2 people
James Costello 203 people
Jamie Costello 9 people
Jan Costello 2 people
Jane Costello 20 people
Janet Costello 20 people
Janette Costello 2 people
Janice Costello 9 people
Janis Costello 2 people
Jasmine Costello 2 people
Jason Costello 22 people
Jay Costello 6 people
Jean Costello 20 people
Jeanette Costello 4 people
Jeanne Costello 10 people
Jeannette Costello 3 people
Jeannie Costello 3 people
Jeff Costello 4 people
Jeffery Costello 4 people
Jeffrey Costello 23 people
Jenifer Costello 2 people
Jenna Costello 6 people
Jennie Costello 5 people
Jennifer Costello 64 people
Jeremiah Costello 2 people
Jeremy Costello 2 people
Jeri Costello 4 people
Jerry Costello 6 people
Jess Costello 3 people
Jesse Costello 2 people
Jessica Costello 23 people
Jessie Costello 2 people
Jill Costello 10 people