Which one is the oldest, lawyer Ma Guang, Su Shi or Wang Anshi?

Among the three, Sima Guang is the oldest.

Sima Guang: Born in 1019, his courtesy name is Junshi and his nickname is Yuansou. He is Han nationality and a native of Baihua Township, Xia County, Shaanxi Province (now Xia County, Shanxi Province). He is known as Mr. Baihua in the world.

Su Shi: Born in 1037, his courtesy name was Zizhan and Hezhong. He was also known as Dongpo Jushi, and was known as Su Dongpo and Su Xian in the world.

Wang Anshi: Born in 1021, named Jiefu and Banshan, Han nationality, from Linchuan (now Linchuan District, Fuzhou City, Jiangxi Province), a famous thinker, politician, writer, and reformer in the Northern Song Dynasty.