Hi Jill,
Unfortunately I can't be much help to you as I have not yet started researching the French side of my family. However, I do have a connection to a LeTellier family from Caen. All that I know of them is that this surname is the surname of one of my great great grandparents. The LeTellier family of Caen married into the Foucard family - my great grandfather Emile Paul Arthur Foucard migrated to London some time after the 1840s where he and his brother Charles Auguste Arthur Foucard established a few businesses - one being Charles Foucard Goldrei and Son. If you do an inter-net search you will find details about this company. My cousin in Sweden informs me that the Foucard Estate in Caen - which was quite large - was completely destroyed by the Nazi's during the second world war. It was used as some kind of Nazi base and I suspect a lot of family items were looted, so much of the family history was lost at this time. I wish I could be of greater assistance, but until I start researching this side of my family - at least in France - I can't offer more than this.

Cheers,

Don Cameron.