I just spotted your message. While I don't have a Eunice listed for Abraham and Ruth, it is very likely I don't have all of their children.
I have Abraham Shriver listed as the son of Elias Shriver b. 1795 in Frederick Co., VA. His mother would have been Delilah Jenkins - also born in Virginia.
Elias's parents were Abraham Shriver b. 1768 in Frederick Co., VA and Mary (Polly) Kackley - also b. in Frederick Co. in 1770.
While I don't have any information on a Eunice Shriver - I do have a little on a couple of children who would have been siblings - an Ellis and William Shriver who were both born in Monroe County, Ohio. The family left Ohio and are next seen in Wayne County, Iowa.