Siusan \si(u)-san\ as a girl's name is a variant of Susan (Hebrew), and the meaning of Siusan is "lily".

The baby name Siusan sounds like Suzan, Susann, Susana and Soosan. Other similar baby names are Sissy, Sissie, Lison, San, Sasa, Season, Sina, Sean, Siena, Signa, Siriana, Sissey, Sissee, Sloan, Suzon, Suzane, Suzana, Susy, Susie, Susi, Susee, Suse, Susanne, Susanna, Susanka, Suesann, Sueann and Suesana.