Rolly \r(ol)-ly\ as a boy's name is a variant of Roland (Old German), and the meaning of Rolly is "renowned land".
The baby name Rolly sounds like Rollo, Roley, Rolle and Rowly. Other similar baby names are Ronny, Billy, Coley, Colle, Coll, Colla, Colley, Cully, Roy, Kelly, Morly, Noll, Poll, Radly, Rawly, Rolph, Rolf, Rowl, Roul, Redly, Reilly, Ridly, Riley, Riply, Risly, Roald, Robby, Rocky, Rockly, Rory, Roddy, Rojay, Rollin, Rollie, Rollan, Rolfe, Rorry, Rorey, Rowdy, Rowley, Royle, Ryley, Sully, Tully, Wally and Willy.