The information in the public domain is almost endless on the Scourfields of New Moat etc;http://www.historyofparliamentonline.org/volume/1790-1820/me...http://en.wikipedia.org/wiki/John_Scourfieldhttp://discover.llgc.org.uk/default.ashx?q=scourfield+new+mo...http://records.pembrokeshire.gov.uk/CalmView/Overview.aspx?s...
Have you studied William Scourfields will of SD1610-045 of New Moat
The earliest New Moat Scourfield mrge noted is in 1817 Thomas of clarbeston to Jane Roblin.
The above was just a few minutes research, not really sure what else one can add.
Owen Ap Benfro