Is this the same Doctor John Gabe from Merthyr?

The Lancet March 13th 1920

It's getting very confusing as the Dr. J. Rees Gabe in the article above [the one who attended the death scene of Mary Jane Kelly] and who I've discovered definitely came from Merthyr, doesn't always seem to coincide with the information I've found about Doctor John Gabe who worked at the Infirmary St. Tydfil's Hospital. Let's look at the evidence:

Reasons they might be the same person:

1. They're both doctors called John Gabe from Merthyr Tydfil.

2. Both have been described as being Medical Officers.

3. Both were involved in Vaccination programmes.

Yet, would John Rees Gabe who settled at number 16 Mecklenburg Square London have had the time to work back and forth between London and Merthyr Tydfil?

The answer could be that the Doctor John Gabe who worked at St. Tydfil's Hospital might be one of a twin. I found this newspaper snippet and the year the twins were born would fit in well with the Doctor John Rees Gabe in London. He was 68 when he died on in March 1920 so he could have been born in 1853. I've also found definite evidence that a Rees Gabe was John Rees Gabe's father. This Rees Gabe mentioned in the birth section of the newspaper, might have been a leather cutter before he became a publican.

So were there twins born in 1853 in Merthyr Tydfil, who both became doctors? Or was there just one who became a doctor? Although on a later census I could only find a boy by the name of Joseph Gabe who would fit the age mentioned, no mention of a twin. Maybe one twin died. But on the other hand, I have found evidence that the Doctor John Gabe in Merthyr had a brother who he worked with one night, this was mentioned in an inquiry.

I've also found a Thomas Gabe who was a doctor in Merthyr [could he be John's twin brother?] and of course a John Bernard Gabe another doctor, who moved to Swansea. Considering there weren't many Gabes in Merthyr Tydfil at the time, it seems odd that so many of them should become doctors.