In the entire world, Leifsen (Leifsen 
) is an extremely rare unknown gender forename. Much more frequently, Leifsen is the last name as well as the forename.
Mr, Esben, Vicki, Marsha, Steven, Alison, Ashlyn, Astrid, Debbie, Joseph, Taylor, Thomas, Hilary, Marlene, Christy, Russell, Tiffany, Marielle, Adrienne, Charlynn, Terje, Thorleif, Julia, Linda, Ms, Kim, Lee, Jan, Mary, Chaz, Kara, Leiv, Leif, Jarl, Thad, Scott, Andre, Angie, Anker, Chris, Karen, Keith, Randy, Janet, and Veronica