AGUILAR, or AGUILAR DE LA FRONTERA  , a town of southern Spain, in the province of Cordova; near the small river Cabra, and on the Cordova–Malaga railway . Pop . (1900) 13,236 . Aguilar " of the Frontier " was so named in the middle ages from its position on the border of the Moorish territories, which were defended by the castle of Anzur, now a ruin; but the spacious squares and modern houses of the existing town retain few vestiges of Moorish dominion . The olives and white wine of Aguilar are celebrated in Spain, although the wine, which somewhat resembles sherry, is known as Montilla, from the adjacent town of that name . Salt springs exist in the neighbourhood, and to the south there are two small lakes, Zonar and Rincon, which abound in fish .