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Ademar Fonseca (commonly known as Dema, 1963–2017), Brazilian football manager •
Dema (footballer) (born 1983), William de Mattia, Brazilian football midfielder •
Dema Kovalenko (born 1977), Ukrainian-American footballer •
Dorji Dema (born 1983), athlete from Bhutan who competes in archery •
Gjergji Dëma (born 1971), Albanian footballer •
Marjan Dema (born 1957), Professor of Mathematics and Rector of the University of Pristina •
Tjawangwa Dema (born 1981), Motswana poet ==Places==