In the entire world, Seesing (Seesing 
) is an extremely rare unknown gender first name. Much more prevalently, Seesing is the last name as well as the forename.
Mr, John, Jean, Jeff, Theo, Tony, Elke, Eddy, Emma, Fred, Mason, Seré, Arisa, Arjan, Chase, Clare, Berry, Kathy, Petra, Randy, Ralph, David, Leon, Laura, Gary, Resy, Bo, Max, Mia, Bas, Kai, Pat, Rob, Ron, Gus, Jan, Tom, Marc, Mary, Mark, Saya, Alex, Axel, Beth, Koos, Paul, Roos, Daan, and Larry