Botkin grave at Nevsky Cemetery

Can someone please help me identify this grave?  I was told by my guide that it was Dr. Eugene Botkin, but I now realize that this cannot be true since his remains were buried with Tsar Nicholas II and family at Peter and Paul Cathedral.  I also do not believe it is his father, who was court physician to Tsar Alexander II and Alexander III.

[Mathematic, art and history in ♥]

I believe it is his father's grave too, or his bother's, perhaps. I think he was Eugenii Sergeevich Botkin, and I see name 'Serge' there.

I don't think it is his father, Sergei Petrovich Botkin (1832–1889), because of the date 1910, unless I'm reading it wrong.  Can someone translate what else it says?

[Mathematic, art and history in ♥]

Боткин, Сергей Сергеевич (1859—1910) — врач, коллекционер, сын С. П. Боткина. (not grave caption, but I have found this across web)

I am pretty sure it is Eugenie's brother, and son of Serge Petrovich Botkin.  

EDIT: You are welcome.

Wow! Thank you so much for clearing this up!!

I can't believe a guide told you it was Dr. Eugene Botkin!! 

She also made a big deal about how Catherine the Great was looking across at her favorite grandson, Alexander I, in the first room we went through on tour of the Alexander Palace.  The portrait of Catherine II is very famous and the other portrait is below.  I now know that is is Nicholas I.  As an aside, she was very nice.