People : Jack Kowalczyk to Judy Kowalczyk
Jakub Kowalczyk 2 people
James Kowalczyk 22 people
Jamie Kowalczyk 3 people
Jan Kowalczyk 3 people
Jane Kowalczyk 3 people
Janet Kowalczyk 2 people
Janice Kowalczyk 3 people
Janina Kowalczyk 4 people
Janine Kowalczyk 2 people
Jason Kowalczyk 6 people
Jay Kowalczyk 2 people
Jayne Kowalczyk 2 people
Jean Kowalczyk 4 people
Jeffrey Kowalczyk 4 people
Jennifer Kowalczyk 10 people
Jeremy Kowalczyk 2 people
Jessica Kowalczyk 3 people
Jill Kowalczyk 3 people
Joanna Kowalczyk 2 people
Joanne Kowalczyk 4 people
Joe Kowalczyk 3 people
John Kowalczyk 29 people
Jonathan Kowalczyk 3 people
Joseph Kowalczyk 23 people
Joshua Kowalczyk 2 people
Judy Kowalczyk 2 people