DNA testing for genealogy continues to improve. If you had some of your Copple relatives tested several years ago, it may be worthwhile to have them retested. Likewise, as DNA testing companies have gathered more results and samples, you may be able to find more matches if you search again with your test results.opple Genealogy. Many things can go wrong when a record collection is indexed. If you're having diffculty finding Copple ancestors in a particular database at one site, try finding it on another and compare the results.