The 1860 Census for Worcester shows a Patrick (28yrs) and Mary Kennedy (28yrs) with a two-year-old James, and Ellen, 8: John, 7: Thomas, 4.
This may be the couple that wed in 1849, on my birthday; Feb. 20. The witnesses of that marriage married each other that day, Patrick and Mary stood up for them.
Feb. 20 1849 Patrick Kennedy to Mary Byrnes, the witnesses were
Feb. 20 1849 Richard Byrnes to Mary Kennedy. Three other couples were joined that day, Fat Tuesday, last chance before lent that year. Fr. Gibson officiated them all.
Of course the couple in the census might be Pat and Mary (Burke) Kennedy, married on May 9 1849. But how interesting would that be?