Elias second married Ada Jane Bird. Born ca 1824 in Holland.
1870 Federal Census. Fredonia, Calhoun Couny, Michigan
Roll 667, page 598B
Post Office Marshall
Jane De Koyer, 46, keeping house, b. Holland
Solomon De Koyer, 16, works on farm, b. MI
John De Koyer, 19, works on farm, b. MI
Dorah De Koyer, 13, at home, b. MI
Elias De Koyer, 7, b. MI
Ada De Koyer, 5, b. MI
Willie De Koyer, 3, b. MI
Jelin Deblond, 22, (male), works on farm, b. Holland
Catherine Deblond, 20, at home, b. MI
Cornelius Deblond, 18, works on farm, b. MI
1880 Federal Census. Fredonia, Calhoun Couny, Michigan
Roll 575, page 230A
William Dykema, 64, farmer, b. Holland, parents b. Holland
Ada Jane Dekoyer, 59, wife, keeping house, b. Holland, parents b. Holland
Elias DeKoyer, 19, step son, laborer, b. MI, parents b. Holland
Ada DeKoyer, 13, step daughter, b. ditto
William DeKoyer, 14, step son, b. ditto