I had done extensive research on the Dawes Rolls.The only person I found named Lamascus was Annette Henrietta (Scott) Lamascus (1880-1957), the wife of Jesse Lyman Lamascus. Jesse Lyman Lamascus (1876-1953)was the son of Giles Austin "Lee" Lamascus & Susie Culpepper.
It was Susie's claim to the family that she was Indian that led me to the research. The results were unclear, but there is a strong possibility that Susie's mother, Evaline Russell, was half Indian. But, she was not Cherokee, although she lived with the Cherokee.