In the entire world, Lontz (Lontz 
) is an extremely rare unknown gender forename. Much more frequently, Lontz is the last name as well as the forename.
Jo, Jeff, Jill, Tara, Tami, Todd, Edna, Eric, Marie, Marcy, Mandy, Mason, Megan, Shyla, Susan, Scott, Alvin, Angel, Aimee, Cheri, Carla, Carli, Jean, John, Jake, Lisa, Ed, Meg, Sam, Sue, Bob, Kim, Jim, Tom, Tim, Mary, Cathi, Sara, Skip, Alan, Anna, Anne, Adam, Carl, Dave, Dale, Dawn, Doug, Sean, and Cindy