It may be possible to confirm family relationships by comparing test results with Roland 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 111 markers, haplogroup R-M269, FTDNA kit #B255351, MitoYDNA ID A10107[compare]
It is likely that these autosomal DNA test-takers will share some percentage of DNA with Roland:
AncestryDNA, GEDmatch A919057[compare], yourDNAportal ROL5b49b513, Ancestry member rwcarter194