Dorothy was his wife in 1695.
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A John Perris married a Dorothy Harris 4 Oct 1649 Saint Clement Danes, Westminster, London (IGI extract). I have assumed she is the Dorothy in question.

• Married: 14 OCT 1649 in St Clement Danes, Westminster, London ²

1. William Perris
2. John Perris
3. Henry Perris
4. Mary Perris b: 1653
5. Elizabeth Perris

1. Text: Mills family researcher
   Norman Penty
   <Pentytree@aol.com>
2. Text: IGI: Extract from parish register or other original record.
   www.familysearch.org