It may be possible to confirm family relationships by comparing test results with Ryan or other carriers of his ancestors' Y-chromosome or mitochondrial DNA.
Y-chromosome DNA test-takers in his direct paternal line on WikiTree:
Family Tree DNA Y-DNA Test 700 markers, haplogroup R-DF21, FTDNA kit #B786099
Mitochondrial DNA test-takers in the direct maternal line:
Family Tree DNA mtDNA Test Full Sequence, haplogroup H1b1, FTDNA kit #B786099
It is likely that these autosomal DNA test-takers will share some percentage of DNA with Ryan:
AncestryDNA, GEDmatch FQ1122947[compare], yourDNAportal RYA8a51e615, Ancestry member Binuru