The name "Isaiah Ferguson" is rare in Irish records and to date every instance discovered has been been traced back to Isaiah Jeremiah Ferguson or as is the present case (see 1901 census) yet to be proved one way or the other.
| Name | Relation | Age | Occupation | Marriage | Where Born |
| James McCann | Head of Family | 91 | Widower | Westmeath | |
| Isiah Ferguson | Grandson In Law | 34 | Ag Labourer | Married | Westmeath |
| Alise J Ferguson | Granddaughter | 33 | Married | Westmeath | |
| John Henry Ferguson | GGrandson | 6 | Westmeath | ||
| Eleanor Ferguson | GGrandDaughter | 2 | Westmeath |
| Name | Father | Mother | Birth Date | Birth Place | Vol | Page |
| Mary | James FERGUSON, Laborer | Margaret SOMERS | 21 Oct 1868 | Dalystown, Castletowngeoghegan | 18 | 309 |
| Patrick | James FERGUSON, Farmer | Margaret SOMERS | 2 Aug 1873 | Dalystown | 13 | 294 |
| Edward | James FERGUSON, Farmer | Margaret SOMERS | 17 May 1876 | Dalystown | 8 | 320 |
| Date | Location | Name | Condition | Age | Occupation | Cause | Informant | |
| Oct 4 1867 | Dalystown | Judith Ferguson | married | 55 y | wife of Patrick Ferguson in America Labourer | Intra thoracic tumor | James Ferguson, occupier, Dalystown |
| |
|