Family: John Costigan / Bridget Dunn (F30803)
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 | John Costigan (1803-1849) |
 | Bridget Dunn (1807-1880) |
| Julia Costigan (1826-1899) |
| Michael Costigan (1827-1892) |
| Hon. John Costigan (1835-1916) |
| Helen Costigan (1839- ) |
| Catherine Costigan (1837- ) |
| Thomas Costigan (1842- ) |
| Guillaume (William) F. Costigan (1843-1882) |