Hi Jean
The 1881 census entry for Thomas and Christian Bridson at Ballaquaggin ( St Anne L, district 2a, page 10) shows that the 14 year old grandson is John Macadam ditto, so Macadam is his middle name.
JOHN MACADARN BRIDSON Pedigree
Male
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Event(s):
Birth:
Christening: 20 SEP 1866 Marown, Isle Of Man, England
Death:
Burial:
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Parents:
Father: PHILLIP JOHN BRIDSON Family
Mother: MARGARET BRIDSON
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Messages:
Extracted birth or christening record for the locality listed in the record. The source records are usually arranged chronologically by the birth or christening date.
No source document or additional information exists.
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Jean C