Family name Riitu (Riitu 
) , throughout the world, is an extremely rare cognomen. The family name Riitu is characteristic of Southern Asia, particularly India, where it is an extremely rare surname. Much more prevalently, Riitu is the forename as well as the last name.
Rani, Wikström, Rautionaho, Pirkkalainen, Saundankar, Mäkeläinen, Viirimäki, Raappana, Strübing, Kullberg, Shukla, Sharma, Gupta, Chugh, Singh, Jain, Devi, Kaamaal, and Kaartinen