"I'm being somewhat flippant by saying you can tell all you need to know about his judgment by the fact that he named his sixth child Sixtus, but there is a lot of truth in it too!"
no there isnt. The child presumably has 2 parents? perhaps it was the mum's idea and JRM, rather like my gallant husband saw what an effort she went thru to birth the baby, and gave up all ideas of naming him "bob" and let her have her way