Erdélyi is a word of Hungarian origin, meaning “related to Transylvania”.
Arthur Erdélyi (1908–1977) — Hungarian-born British mathematicianJános Erdélyi (1814–1868) — Hungarian poet, critic, author, philosopher and ethnographistStefan Erdélyi (1905–1968) — Hungarian-Romanian chess masterTamás Erdélyi — professor of mathematics at Texas A&M UniversityVasile Erdelyi (1794–1862) - Romanian Greek Catholic bishop of Oradea MareTommy Ramone aka. Thomas Erdelyi, born Erdélyi Tamás (b. 1952) — Hungarian American record producer and musician