Willy G. Rivas, 37, of Haverhill, passed away Wednesday, July 6, at Merrimack Valley Hospice House, Haverhill. He was born in Guatemala Oct. 27, 1978, son of Maria (Arana) Rivas of Haverhill and the late Gabino Rivas who passed away in 2014. He and his family came to the U.S. in 1981 and was educ