Rien \rien\ as a boy's name is a variant of Marino (Latin) and Ryan (Gaelic), and the meaning of Rien is "of the sea; king".

The baby name Rien sounds like Ren, Ryen, Rion and Rian. Other similar baby names are Ries, Ron, Aren, Airen, Rich, Ric, Arien, Ben, Bren, Brien, Rick, Biren, Cian, Kian, Deen, Dion, Den, Win, Euen, Finn, Fin, Rik, Gian, Eion, Jian, Eian, Keen, Ken, Len, Lion, Linn, Lin, Oren, Pen, Raiden, Rain, Raven, Rae, Reed, Rice, Rees, Regen, Rene, Reg, Rei, Reno, Ruben, Ruel, Rey, Riki, Rico, Rikk, Rigg, Riley, Ring, Rio, Reo, Rip, Rito, Roe, Ronn, Rowen, Roan, Rozen, Ryun, Ryon, Ryden, Rye, Sion, Zion, Vin and Winn.