Anthony Potter was born about 1628 in Coventry, Warwickshire, England. (citation needed).
He was in Ipswich, Essex, Massachusetts by 1648.
He died 26 March 1690 in Ipswich, Essex, Massachusetts.
John Whipple's 1669 includes a bequest: "I give unto Anthony Potter my son in law some times, forty shillings," implying that Anthony Potter had been married to a daughter (deceased?) of John Whipple. Most say that daughter was Elizabeth, but Anderson in his Great Migration series claims otherwise.
I've found what appears to be the source for Anthony Potter marrying a daughter of John Whipple, although it doesn't indicate which daughter. John Whipple of Ipswich made a will in 1669; among other things it says: "I give unto Anthony Potter my son in law some times, forty shillings." What's odd about this is the "some times". I wonder if it means "former" and that Anthony's wife, and John Whipple's daughter was deceased by 1669.
The source for Whipple is: Historic Homes and Places and Genealogical and Personal Memoirs Relating to the Families of Middlesex County, Massachusetts , Volume 4 page 1816-1817. There is also mention of Potter and Whipple as a couple in: Genealogical and Family History of the State of Maine, Volume 1 page 52. I hope this is helpful. TR