Allen–La Donna: 11 cM
Observed Genetic Phenomenon — Common Ancestral Path Undetermined
The evidence before the explanation
Autosomal testing shows that Allen and La Donna share 11 cM across one segment, less than one percent shared DNA. The ancestral path responsible for that segment has not been identified.
The research context
La Donna’s Jarrell ancestry later became relevant because the Jarrell documentary record intersects descendants of Darby Quinn in eighteenth-century Virginia. That historical intersection makes the match worth investigating, but it does not identify the source of the 11 cM segment.
Direct path to the evidence
The autosomal observation is kept separate from the historical explanation, which remains unresolved.
What can — and cannot — be said
The match is documented as an observation. The common ancestor remains unresolved. Any proposed connection through Darby Quinn, the Jarrells, or another line remains a hypothesis until evidence establishes the path.
An observed phenomenon, an undefined hypothesis.