​APOLLONIUS, surnamed ὁ δύσκολος (“the Surly or Crabbed”), a celebrated grammarian of Alexandria, who lived in the reigns of Hadrian and Antoninus Pius. He spent the greater part of his life in his native city, where he died; he is also said to have visited Rome and attracted the attention of Antoninus. He was the founder of scientific grammar and is styled by Priscian grammaticorum princeps. Four of his works are extant: On Syntax, ed. Bekker, 1817; and three smaller treatises, on Pronouns, Conjunctions and Adverbs, ed. Schneider, 1878.