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 22.214.171.124 Sarah Blakeney m. William Persse 126.96.36.199.1 Elizabeth Persse 188.8.131.52.2 Robert Persse 184.108.40.206.3 Henry Stratford Persse 220.127.116.11.4 William Blakeney Persse 18.104.22.168.5 Parsons Persse 22.214.171.124 Col William Blakeney 126.96.36.199.1 Field Marshall Sir Edward Blakeney 188.8.131.52 Theophilus Blakeney m. Margaret Stafford 184.108.40.206.1 Margaret Blakeney 220.127.116.11.2 Elizabeth Blakeney 18.104.22.168.3 Ellinor Harriet Blakeney 22.214.171.124.4 John Henry Blakeney 126.96.36.199.5 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.