Margaret Shannon Mockler was born in Thrules Grange, Tipperrary, Ireland on February 28, 1843. Her parents were John Mockler and Maria Shannon. They came to America and settled in Buffalo, NY. They lived at 205 Amherst, Buffalo, N.Y. Margaret Mockler married Timothy Rahill in Buffalo on May 1, 1859. Margaret died in Buffalo on April 20, 1893 and is buried in Holy Cross Cemetery in Lackawana, N.Y.