I have out together a few notes but I think more research is needed to be certain that we have the correct Rees. If it is possible to find any direct male descendants, a DNA test would be useful.
It is possible that Margaret David was of a lower status than Evan Nanney, which stood in the way of a marriage in Wales. Could this have prompted them to emigrate?
Other contemporary illegitimate births in Dolgellau also describe the mother as a concubine.
Often, the father's name is missing from the baptisms but it is included in two other Nanney records: - 1707 in Towyn - Thomas the illegitimate son of Lewis Nanney and Jane Meredith Evan? - Baptised 19th March 1708 in Towyn - Thomas the illegitimate son of Rees Nanney and Jane John - Baptised 24th September
but not in the only female that I have found: - 1683 in Dolgellau - Catherine the illegitimate daughter of Margaret Nanney - Baptised 24th August
I am not sure about them being non-conformist at that time. Presumably the marriage and baptism could have taken place within their church.
The Wynnstay Pedigrees, which were drawn up between 1632 and 1677, list three children for William Nanney and Ellin Edwards - Griffth, John and Margaret I have not found any records that can be attributed definitely to Griffith but there are two for John: -
From 'Transactions of the Shropshire Archaeological and Natural History' 1650 John Nanney sonne of William Nanney of Maylan co : Merionith gent deceased apprentice to Mr Hugh Nanney for 7 years (Hugh Nanney, born c1600, the son of Richard Nanney of Nannau, was a Mercer in Shrewsbury, Shropshire, England)
From the Nannau Manuscripts index: - 1671-2 Mentions a judgment against John Nanney regarding the debts of Hugh Nanney of Shrewsbury, Mercer.
I am not sure how old John would have been when he began his apprenticeship but if he was about fourteen, he would have been born c1636. Griffith is listed before him and so possibly c1634. There is a mention of William Nanney and Ellin Edwards dated 1621 but it is not clear if they were married at that time. If so, the children would be older or born late in the marriage.
The index has other references to Nanneys of Maelen (Maylan), including Hugh, William, John and Richard. I have not looked at these records in detail but will attempt this next year.
There is a bond of 1673 following the death of Captain John Nanney of Llanfachreth, which mentions his brother, Richard, and sister, Ellin.
It is thought that Rees was the son of John Nanney but is there any record of this?
There is a John Nanney who has a loose link with the Quakers and he seems to have had children. A prenuptial agreement of 1687 mentions Margaret Lloyd, wife of John Nanney, having title to Tyddyn y Llwyn for the rest of her life and then to the use of her eldest son (not named). Lewis Owen of Tyddyn y Garreg is mentioned in the document and Tyddyn y Llwyn is next door to Gwanas, the home of Lewis and Rowland Owen, both of whom bought lands in Pennsylvania but never left Wales. There is a record of Margaret Lloyd, described as the wife John Nanney, being buried in Llanfrothen, Merionethshire, in 1699. John Nanney was buried there in 1716.