All over the world, Aróstegui (Aróstegui 
) is an extremely rare unknown gender first name. Much more frequently, Aróstegui is the last name as well as the forename.
Ana, Irene, Willy, Martin, María, Manuel, Miguel, Sergei, Alvaro, Amparo, Carlos, Rafael, Daniel, Lorena, Lucía, Javier, Jesús, Thayss, Isabel, Ángel, Mariana, Marcelo, Edgar, Jorge, José, Jairo, Ona, Alan, Rosa, Luis, Jose, Juan, Omar, Yuni, Maria, Mirna, Matías, Mikel, Amaya, Asier, Cesar, Kathy, Katya, Pablo, Pedro, Pilar, Diego, Ligia, Angel, and Andrés