For background on how the map was made (and its flaws), see the relevant blog entry.
Stephenson | numerous: Midlands, Tyrone-Fermanagh etc. Generally as Stephens but Ulster names may well be Scottish. |
Stevenson | Very numerous: mainly Ulster. Ir. Mac Stiofáin. The name is very general in Britain and corresponds with the large 17 cent immigration into Ulster. SI. |
DEDs where Stevenson and a second surname are found together
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