In the Unknown origin, Soo means "Soo \soo\ as a girl's name.
The baby name Soo sounds like Sue and Zoe. Other similar baby names are Toos, To, Bao, Bo, Doe, Io, Jo, Joi, Joy, Lou, Mo, Noa, Noe, Roz, Ros, Sal, Sam, San, Sato, Sib, Sky, Soki, Soma and Sofy."