there is a previous thread which 'could' be of interest

http://www.forum.forest-of-dean.net/index.php?mode=thread&id=8009#p8085

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Looking at the 1841 census on this thread - there is a Joseph HARWOOD c1761 - with a Sarah SYNOR c1839 living with them. Gloucestershire BDM - gives Sarah SYNOR's mother's maiden name as PARRY - FOD records, John SYNER married Louisa PARRY - St Briavels - 15 October 1834.

John & Louisa SYNER (transcribed as LYNES on Ancestry) - are on the 1861 census in Wales - Newport St Woollos - John aged 47 - is a Master Mariner - both place of birth transcribed as Brockway, (assume Brockweir) - Glos.

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(one of Richard's son's was named JOSEPH - so probably a family name.

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Using the Advance Search for a Richard HARWOOD as a witness - there is one at Hewlesfield - 13 june 1826 - of a Henry WRIGHT and Eleanor WORGAN - another witness was Margaret SYNER.

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If the family were Waterman (as some of them where) - they could have been married anywhere along the waterways.