In all the world, Seilo (Seilo 
) is a very rare masculine first name. The forename Seilo is habitual in Sub-Saharan Africa, particularly South Africa, where it is a very rare masculine name. More prevalently, Seilo is the last name as well as the forename.
Mr, Jaana, Jenny, Jukka, Juuso, Jyrki, Teija, Elias, Harri, Henna, Ville, Stella, Päivi, Ronald, Jaakko, Joseph, Tapani, Tuukka, Maritta, Matthew, Michael, Stephen, James, Pekka, Peter, Chris, Ms, Dee, Jon, Mary, Mark, Mike, Karl, Paul, Pete, Lori, Aleksis, Lynn, Juho, Timo, Noah, Eric, Emma, Maria, Matti, Micke, Mikko, Seppo, John, and Clarice