From Master Ding Academy Lineage Perspective

Traditional Yang Style Tai Chi Chuan
Founder, Yang Lu Chan (also known as Yang Fu Kuei) 1799 -1872
He was from Yongnian County, Guangping Prefecture in Hebei, China. Already an accomplished martial arts practitioner, he was drawn by the reputation of the Chen clan from Chen Jia Kou (Chen Village), Hebei. He studied under Master Chan Chang Hsing and was later accepted as one of his disciple. Upon receiving the full transmission, he continued to improve and refine this ancient system of martial arts after he returned home. He taught this new system in his home town, initially known as Ruan Chuan ( Soft Fist) or Mian Chuan (Cotton Fist). Through his contacts, he later took up appointment in the Imperial Palace, Beijing. He had three sons Yang Pan Hou ( 1837-1892), Yang Feng Hou (died young) and Yang Chien Hou (1839-1917).
2nd Generation Lineage
Yang Chien Hou (1839-1917)
The third son of Yang Lu Chan, he began learning his family Tai Chi Chuan from his father at a young age. Through his dedication and hard work he became an accomplished martial artist of his family style – re-known for his softness and hardness skills. He too had three sons, Yang Shao Hou (1862-1930), Yang Cong (died young) and Yang Cheng Fu (1883-1936)
3rd Generation Lineage
Yang Cheng Fu (1883-1936)
The third son of Yang Chien Hou and leading member of the Yang family to popularise Yang Style Tai Chi Chuan making it the most widely studied style of Tai Chi Chuan in the world. He was able not only to teach the martial aspects of Tai Chi Chuan but also modified the form for people interested in the health aspects of the art. He as four sons: Yang Sau Chung (1911-1985) Yang Zhen Zi (1921 -2007), Yang Zhen Dou (1926) and Yang Zhen Kwok (1928)