In all the world, Sieli (Sieli 
) is a very rare girly first name. The first name Sieli is characteristic of Latin America and the Caribbean, particularly Brazil, where it is a very rare feminine name. Much more prevalently, Sieli is the last name as well as the forename.
Mr, Erin, Enzo, Vita, Vito, Maria, Marie, Mario, Marcy, Mirya, Shirl, Carol, Paula, Peppe, Peggy, Ralph, Renee, Dario, Dylan, Lezin, Luisa, Lydia, Elio, Janet, Nino, Tara, Sal, Ana, Leo, Tom, Ivo, Mary, Mark, Sara, Alex, Anna, Paul, Pina, Phil, Raul, Dina, Gary, Gina, Lori, Luis, Jean, Juan, Tony, and James