Thank you again for the help!
I sent Skoumi an email for now and will wait for a reply. I'm going on Sunday to meet a relative and gather more information and then I will probably call Skoumi if he doesn't answer by that time. As far as I know, my family assume he was born in Putnok but someone in the family has a photo of his grave in Lucerne, Switzerland and maybe on it the place of birth is written.
His name was Lipót (or Leopold) Mayer Jehuda Rothschild. I'm not sure about the year of birth but I can tell you that his wife was born around 1893 and his first child around 1913.
I hope this helps. I will come back if I manage to collect more information from my relative on Sunday.
Thank you once again!