Mary Howell was one of the three wives of Thomas Lowthropp and the mother of the Rev. John Lothrop/Lathrop, immigrant to Plymouth Colony. Her profile currently shows that she was the daughter of John Howell and Gauche St. Andrews, but this seems to be doubtful.
To quote from "Rev. John Lothropp's Ancestors" at http://www.jtbullock.com/Tree/John_Lothropp.html :
"There is much confusion about Mary Howell the second wife of Thomas Lathrop. She was born sometime between 1538 and 1556. Some say her name was Mary Ellen Salt the daughter of Robert Salte and Sanchia St. Andrews, who was the daughter of John St. Andrews. But according to the Collections for a History of Staffordshire, Volume 5, Mary Salte married a Thomas Lathrop, son of Michaell Lathropp, who was living in Staffordshire in 1614. So this could not be our Mary, as our Thomas died in 1606 and was the son of Robert. Some say she was married to a John Howell before she married Thomas; others say that she is the daughter of John Howell and Gauche St. Andrews, daughter of John St. Andrews. Some say Gauche and Sanchia are the same person. In the October 1995 issue of The American Genealogist #280, Vol. 70, No. 4, there is an article written by Clifford L. Stott called "Lothrop and House Entries in the Parish Registers of Eastwell, Kent." Stott writes that Maud (last name unknown) was the name of John's mother. So there is a great deal of uncertainty about John’s mother. After much research, it is plausible to say that Mary/Maud was born in 1556 and her father was probably John Howell (see his bio for more on this)."