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 184.108.40.206 Sarah Blakeney m. William Persse 220.127.116.11.1 Elizabeth Persse 18.104.22.168.2 Robert Persse 22.214.171.124.3 Henry Stratford Persse 126.96.36.199.4 William Blakeney Persse 188.8.131.52.5 Parsons Persse 184.108.40.206 Col William Blakeney 220.127.116.11.1 Field Marshall Sir Edward Blakeney 18.104.22.168 Theophilus Blakeney m. Margaret Stafford 22.214.171.124.1 Margaret Blakeney 126.96.36.199.2 Elizabeth Blakeney 188.8.131.52.3 Ellinor Harriet Blakeney 184.108.40.206.4 John Henry Blakeney 220.127.116.11.5 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.