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 220.127.116.11 Sarah Blakeney m. William Persse 18.104.22.168.1 Elizabeth Persse 22.214.171.124.2 Robert Persse 126.96.36.199.3 Henry Stratford Persse 188.8.131.52.4 William Blakeney Persse 184.108.40.206.5 Parsons Persse 220.127.116.11 Col William Blakeney 18.104.22.168.1 Field Marshall Sir Edward Blakeney 22.214.171.124 Theophilus Blakeney m. Margaret Stafford 126.96.36.199.1 Margaret Blakeney 188.8.131.52.2 Elizabeth Blakeney 184.108.40.206.3 Ellinor Harriet Blakeney 220.127.116.11.4 John Henry Blakeney 18.104.22.168.5 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.