Yes, Richie Myler and Stephen Myler are cousins.
Richard David Myler is a professional rugby league footballer who plays as a scrum-half and fullback for the Leeds Rhinos in the Betfred Super League and England and the England Knights at the international level.
Myler was born in Widnes, Cheshire, England.
He has played for the Widnes Vikings in the Championship, and the Salford City Reds in the Championship and the Super League. Myler has also played for the Warrington Wolves and the Catalans Dragons in the Super League.
He signed for Salford from Widnes on a three-year deal in 2008 and contributed to Salford winning the National League One title, scoring 25 tries in 32 appearances, and winning numerous awards as well as the Co-Operative Player of the Year award.
While Stephen Myler is an English rugby player. He played most of his career with the Northampton Saints in Premiership Rugby, and he currently plays for Ospreys in the Pro14.