Michael and Mary (McGovern) Powers (both born in Ireland) had a daughter Margaret as well as sons William and John born in Canada. They were in Canada in 1851; Margaret was born about 1841.
The Margaret in the 1900 census below as born in Canada (in 1858) and her father was Michael Powers, born in Ireland.
The Michael Powers who was living in Buffalo in 1900 was born Sept 1822 in Ireland. My Michael Powers was born in Ireland about 1801. The names (Margaret with parents Michael and Mary) and locations (Ireland and Wentworth*, Canada) are tantalizingly close, but the ages miss the mark by a wide margin (except for the marriage record below).
*Daughter and s-i-l got married in Wentworth, Ontario, Canada