Leonard R. Mailloux, 79, of Hampton, N.H., husband of Kathleen M. (Kelly), passed away Dec. 3, at Merrimack Valley Hospice, Haverhill, surrounded by his family. Born in Haverhill, he was the son of the late Leo A. and Blanche M. (Shaw) Mailloux. Raised and educated in Haverhill, he was a graduate