About the Mendelson surname
The surname Mendelson is associated with a patronymic formation. The -son ending traditionally indicates descent, with the sense “son of.”. A patronymic formation of this kind shows how an older personal name could develop into a family name. Different families could independently adopt a surname formed from the same given name.
Pronunciation:
Mèn-dèl-seun/mɛndɛlsœn/