In the world, Rousu (Rousu 
) is an extremely rare unknown gender forename. Much more prevalently, Rousu is the last name as well as the forename.
Mr, Kari, Kate, Kala, Kori, Kody, Paul, Pasi, Rita, Greg, Curt, Lila, Lois, Jari, Jake, Josh, John, Joel, Jess, Jeff, Juho, Lise, Chad, Aimo, Adam, Ms, Sue, Ari, Amy, Ava, Ben, Dee, Don, Jon, Joy, Mary, Mark, Matt, Mike, Mika, Sari, Simo, Anja, Arto, Arja, Amie, Todd, and Tera