Can't say I'm a huge fan of the name, but given their marketing concept (load the team full of Canadian & Iroquois players), I get it. The logo is pretty cool though. The Iroquois flag is integrated into the Maple Leaf. The team colors are listed as Black, Red, Stale Blue (looks purple to me), and White.
The Nationals are considered a new team rather than a continuation of the Rattlers. Despite the roster and coaching staff transferring to Toronto, the Rattlers name, logo, and history will remain property of the league. This is not a new concept at it has been used in the NFL (Browns-Ravens), MLS (Earthquakes-Dynamo), and more recently in the NBA (SuperSonics-Thunder). This arrangement allows Rochester to have an expansion/replacement team in the future.