Adelphia Look up Adelphia at
district of London, so called because it was laid out by four brothers of a family named Adam, from Greek adelphos "brother," literally "from the same womb," from copulative prefix a- "together with" + delphys "womb," which is perhaps related to dolphin. The district was the site of a popular theater c. 1882-1900, which gave its name to a style of performance.