Sorry - I may have misread my own data! The Maj Robert Blakeney I was referring to appears to actually have been married to Gertrude Blakeney. Susannah Ormsby may not be related to that Blakeney family at all.
For clarification, the Blakeney family I have, of Athenry and Abbert, seems to be as follows:
1. John Blakeney m. Sarah Persse 1.1 Maj Robert Blakeney m. Gertrude Blakeney 1.1.1 John Blakeney m. Grace Persse 188.8.131.52 Sarah Blakeney m. William Persse 184.108.40.206.1 Elizabeth Persse 220.127.116.11.2 Robert Persse 18.104.22.168.3 Henry Stratford Persse 22.214.171.124.4 William Blakeney Persse 126.96.36.199.5 Parsons Persse 188.8.131.52 Col William Blakeney 184.108.40.206.1 Field Marshall Sir Edward Blakeney 220.127.116.11 Theophilus Blakeney m. Margaret Stafford 18.104.22.168.1 Margaret Blakeney 22.214.171.124.2 Elizabeth Blakeney 126.96.36.199.3 Ellinor Harriet Blakeney 188.8.131.52.4 John Henry Blakeney 184.108.40.206.5 Bridget Blakeney
Hope that is helpful. Sorry for the misinformation. I'd be interested to find out how Capt John's family fits with these Blakeneys, if there is a connection.