We do not know the maiden name of Elizabeth, Peter's wife.
The name Fielding was created by Edythe Whitley in her book Rucker Kinsmen written in 1926. Once it's in print -- it's gospel! I have been doing research for forty years on the Ruckers and there is no evidence of a Fielding. In fact, Edythe said she wrote it by mistake and apologized. No one knows where Elizabeth came from or who she was. It wasn't important, back in those days, to keep your maiden name. The only evidence of a woman would be her father's Will mentioning her by name or a family Bible.
The following deed proves Elizabeth died by the 21 Feb 1752 Settlement of the estate of Peter Rucker -- Deed Book A, p.411 - 412, Culpeper Co., VA. (Elizabeth was given a life time use of his property, so when she died, his estate was divided.)
Therefore we say Elizabeth Rucker died circa 1752 (it may have been 1751). She died in Orange Co., VA, which became Culpeper and is now Madison Co., VA.