Around the world, Lempiäinen (Lempiäinen 
) is an extremely rare unknown gender first name. Much more prevalently, Lempiäinen is the last name as well as the forename.
Mia, Juha, Juho, Taru, Tatu, Tero, Timo, Tiia, Nina, Elli, Essi, Eero, Eetu, Ossi, Marja, Matti, Minna, Mikko, Mikke, Sanna, Sanni, Saija, Jere, Joni, Jari, Jani, Anu, Ari, Esa, Ida, Mari, Mona, Mika, Sara, Sari, Sami, Seija, Samu, Anna, Anne, Anja, Arto, Aino, Kari, Kati, Kris, Panu, Rami, Satu, and Sofia