Thomas Sedgwick (1520 – 1588) was the 14th great-grandfather of Cometan, classified as one of Cometan’s distant paternal ancestors in the McKerney family line. Born in Dent near Sedbergh in West Riding, Yorkshire, Thomas married Elizabeth Stenton and they had at least daughter together named Leonard Sidgwick.
In Cometanic ancestry, Thomas is categorised as part of the 16th generation retrograde, classifying him as a distant ancestor of Cometan.