I don't know.I don't have any info on Polly. The information I have is from the Church of Latter Day Saints database (see below).I have another source that gives the name Harrison as one of the fourJohn Brown Johnson sons. My thinking is that Harrison may be Miles middle name or vice-versa.Im still researching this. I'll keep you posted if I find anything.
Miles JOHNSON (AFN:23HK-L3V)CLDSaints Born:Abt 1817Place:, , Virginia, United States Father:John Browne JOHNSTON (AFN: HX02-JG) Mother:Elizabeth SIMS (AFN: 1V15-RSJ) Spouse:Polly WINDSOR (AFN: 23HK-LPL) Marriage:19 Feb 1846