In all the world, Machain (Machain 
) is an extremely rare male forename. Much more prevalently, Machain is the last name as well as the forename.
Mr, Raul, Rosa, Rosi, Rene, Rebe, Ruth, Ryan, Doug, Gaby, Grey, Lino, Lisa, Lori, Luci, Luis, Jane, Jose, John, Juan, Tony, Nora, Kris, Beto, Bere, Anna, Ms, Ana, Amy, Don, Liz, Luz, Jay, Jon, Joe, Eva, Elia, Ugo, Mary, Mark, Matt, Sara, Saul, Alex, Alan, Alma, Aldo, Angi, Marc, and Eloy