Thanks for your info Jambomama,
His parents are for sure Louis & Felicite cos they're named in his old army reserve papers. I'll have to keep digging and be patient! It's great to have Louis' parents names as well- I must have a look at this geneanet web site.
It's strange isn't it how I find extra info but end up more puzzled as to why Prudent Eugene isn't in the records!!!