Fifty years ain’t nothing to sneeze at.That’s how long Josslin Insurance, a brokerage that traces back to a tiny office in New Hamburg opened in 1880, has been under the leadership of the Wagler family. Since patriarch Don purchased it in 1975 with his wife Rose, the business has grown exponentially under sons Scott and Steve. First acquiring an additional location in Tavistock in the 1980s, it was then expanded into Kitchener and Wellesley.Toda…