Around the globe, Sonnentag (Sonnentag 
) is an extremely rare unknown gender first name. Much more prevalently, Sonnentag is the last name as well as the forename.
Mr, Rich, Ruth, Ryan, Dean, Danl, Dave, Dawn, Gary, Gale, Greg, Levi, Lisa, Lynn, Lyle, Jane, Jack, John, Judy, Tara, Toni, Todd, Paul, Tina, Kurt, Karl, Ms, Max, Amy, Dan, Jan, Jon, Joe, Jim, Tim, Uli, Uwe, Mary, Mark, Matt, Mike, Sean, Alan, Anke, Abby, Cody, Barb, Kort, and Nick