The evidence can be compared without forcing the two populations into a single pedigree. Time, place and relationship are the comparison.
Limerick
Early 1700s
Adare and Rosbrien Quin branches are established in County Limerick.
Adare and Rosbrien Quin branches are established in County Limerick.
Later generations
Quin and Goold lines intersect genealogically through the Rosbrien network.
Quin and Goold lines intersect genealogically through the Rosbrien network.
1817
Thomas Goold acquires Athea.
Thomas Goold acquires Athea.
1836
Augusta Charlotte Goold marries the 3rd Earl of Dunraven.
Augusta Charlotte Goold marries the 3rd Earl of Dunraven.
Carteret
18th century
Laughlin Quin is documented in the Newport/Bogue Sound landscape.
Laughlin Quin is documented in the Newport/Bogue Sound landscape.
Burial landscape
Quin/Quinn and Gould graves occupy the same private site associated with Laughlin’s land.
Quin/Quinn and Gould graves occupy the same private site associated with Laughlin’s land.
Later generation
Loftin Bell Quin marries Mary “Polly” Gould.
Loftin Bell Quin marries Mary “Polly” Gould.
Present research
David Gould traces to the Gould family represented at this grave site, preserving a living research connection to that Carteret line.
David Gould traces to the Gould family represented at this grave site, preserving a living research connection to that Carteret line.
Observed convergence — relationship not yet established
Limerick: Quin ↔ Goold ↔ kinship ↔ land ↔ marriage ↔ Dunraven Quin
Carteret: Quin ↔ Gould ↔ same landscape/grave site ↔ marriage ↔ descendants
The resemblance is a research phenomenon. No connecting line between the Limerick Goolds and Carteret Goulds is asserted here.