About the Giannopoulos surname
The surname Giannopoulos is associated with a patronymic formation. The ending of Giannopoulos is characteristic of several Greek surname families and generally points to a patronymic or family formation. The name therefore belongs to a tradition in which an ancestor's given name gradually became a hereditary surname. Different families could independently adopt a surname formed from the same given name.
Pronunciation:
Jja-no-pou-lo/ʒjanɔpulo/