Sir Richard Roger de Sandbach (1256 – ????) was the 27th great-grandfather of Cometan, classified as one of Cometan’s medieval paternal ancestors in the Taylor family line.

Sir Richard is known to have been born in Sandbach, Congleton, Cheshire and is thought to have also died in Sandbach. The identity of Richard’s wife remains unknown although he is recorded to have been the father of his son Richard de Sandback (notice changed of spelling) who connects him to the Cometanic ancestry. Sir Richard was also the son of Sir Knight Richard de Sandbach, although the identity of his mother remains unknown. 

In Cometanic ancestry, Richard de Sandbach is categorised as part of the 29th generation retrograde, and because he was born before 1453, he is classified as a medieval ancestor of Cometan, a title that is rarely bestowed.