The Sunheung-Ahn Clan became one of the most powerful and famous noble clans after Ahn Hyang, who is the grandson of Ahn Yeong-yu (the founder of the Lord (Duke) Chumil Branch and the great-grandson of Ahn Jami, the founder of the Sunheung-Ahn Clan. An Hyang passed the Gwageo(State examination) in 1260(Wonjong 1). And he served as Docheomuijungchan(Vice-premier). An Hyang is considered the founder of Neo-Confucianism in Korea, introducing Song Confucianism to the Goryeo Kingdom. An Hyang is generally numbered among the clan's most illustrious members, and founded a branch of his own within the Sunheung-Ahn Clan, called Lord (Duke) Moonsun Sub-Branch (문성공파(文成公派)). Subsequent to An Hyang and for the rest of the Goryeo Dyasty, the Sunheung-Ahn Clan had members passing the Gwageo(State Examination) for 11 generations; 20 members of the Sunheung-Ahn Clan were made into Dukes or Grand Dukes (봉군(封君)), and produced 17 Daejehaks(대제학), which were then the highest office academics could reach in the Royal Court, equivalent to today's Ministers of Education.