Beekeeping dynasties

I wonder what family holds the record for professional beekeeping through the generations. Here's a four-generation business from Canada that has just won a Nipawin Heritage award:

Knox Apiaries began their bee keeping business in Orono, Ontario in 1875. The business came to Nipawin in 1959 when Bob and Gayle Knox moved here with 400 colonies of bees. Their son Mark, a fourth generation bee keeper, joined the family business in 1984 and now runs 2,200 colonies with his wife and daughters. They employ four people from April to November and an additional 15 to 16 students for the summer extracting period.