Hi! I am searching for Anna Maria Rettig, but have come across Eva Elizabeth Rettig a few times in my searches. This is what a site that I'm a member of (new.familysearch.org) has listed for children of Eva Elizabeth Rettig and Henry Eberly:
Monah Eberly (1855-1862) Ida Eberly (1858-1962) Caroline Eberly (1859-?) Adam E. Eberly (1859-1944)
I've done no research myself on this, but hopefully that's a start for you!