For any bewildered music fans who have Googled the Belfast Cowboys, and come up seeing double, relax. There are indeed two bands going under that moniker. One is a 9-piece Minnesota outfit that focuses on songs by Van Morrison, the Irish singer-songwriter-guitarist-saxophonist-rocker, whose nickname is the Belfast Cowboy. The other one is a trio, consisting of founder and Framingham resident Jerry Robinson (guitar, vocals), Arlington resident Peter Larson (electric guitar, mandolin, vocals), [...]