Thanks for the info. Luther was a given name for sons of three Geurin brothers including Jim B. I have a photo of probably J. B. Geurin as a young man, possibly also one of probably him as a baby on a tintype which needs to be restored. There is a name printed on the back of the man's photo with either J. B. Geurin or J. R. Geurin on the back--it is a small studio photo encased in a holder that displays the photo with the letters written on the back of the holder.