I am tracing my McCool heritage which I have back to Ireland (Londonderry) through the name Thomas McCool (1821-1874), wife Jane, Son Thomas Stewart McCool (1851-?), wife Mary Jane Caswell (1852-1936) and their children (all from New York City) Thomas Herbert McCool (1882-1960), Ernest Stewart McCool (my grandfather, 1879-c.1911), William Percy McCool (1888-?), Ida May McCool (1875-1890) and Olive I. McCool (1885-?).
Thomas Stewart McCool traveled to Toronto, Ontario, Canada possibly in 1871 and then to New York City in 1888 or 1889.
By the way, my real last name should be McCool except for a suspicious name change (and relocation) by my Grandfather Ernest Stewart McCool to Herbert Edward Garfield between 1902 and 1904.