Frank Davis and Captain Henry Davis twin brothers

It is listed that these twin brothers were born on Jan 03, 1872. Frank was my Great Grandmother Jessie’s Father. Captain Henry Davis was her Uncle. They both worked and lived in Connecticut and Nantucket Massachusetts. Both are buried on Nantucket Island Massachusetts. I posted photos of both brothers on this website. I got the pictured information from The Nantucket Historical Association which lists the rest of my ANCESTORS. I know the photo is one of my ancestors but the name is not listed below the portrait. I know he is from the Davis family.

Which man is the portrait of?