Thanks, Tees.
Yes, I agree that it would be worthwhile for Ragna to enquire about the Wandsworth Reformatory and that person's records, just in case there are any identifying details that would rule him in or out. Good thinking, both you & Oonagh.

Ragna will have to confirm this but I believe his medical records list his given names as:
1. Sydney
2. George
3. Frederick
On Ancestry's marriage index, his given names are listed as: Sydney George F.
Of course, we don't know if all of those names are on his birth or baptismal record and, if so, if they are in the same order. I've seen many instances of given names (usually two) being switched around in various documents.
We should be able to find him in 1901. If only he had been listed with his wife and children!
I tried to find the George you mentioned in 1901 but it didn't come up in the index on Ancestry. Would you please give me a few more details so I can look at it? Was this person married but apart from his family and employed as a hotel clerk?
Since his marriage and medical records list him first as Sydney, and they are around the 1901 mark, I would expect him to list himself as Sydney, unless of course that wasn't technically his first name... Oh, argh. The same with using McLaven on official documents around that time, unless the name was mistranscribed...
Thanks!
Josephine