It may be possible to confirm family relationships with Gertrude by comparing test results with other carriers of her mitochondrial DNA.
Mitochondrial DNA test-takers in the direct maternal line:
Shelly Hanson :
Mitochondrial DNA Test HVR1 and HVR2, haplogroup J2b1a
It is likely that these autosomal DNA test-takers will share DNA with Gertrude: