Samuel Stillman Osgood died in 1885.
Godfrey Stillman Rockefeller died in 1983.
Paul Roscoe Stillman was born in 1871.
I think you may mean Lisa Stillman. Her nephew, Ben Stillman, works at Heartland with his horse Red. Lisa Stillman owns (I think) Fairfield, a stables for thoroughbred horses, where she breeds and trains them. Lisa Stillman and her and Ben's involvement varies a little I think in the book and TV series.
Ary Katz was born on October 16, 1985, in Los Angeles, California, USA.
Ary Stillman was born in 1891.
Stillman Drake died in 1993.
Chauncey Stillman died in 1989.
Isaiah Stillman died in 1861.
James A. Stillman died in 1944.
Samuel Stillman died in 1807.
Ary Severo died in 1994.
Ary Renan died in 1900.
Samuel Stillman Osgood died in 1885.
Paul Roscoe Stillman died in 1945.
Juliet Stillman Severance died in 1919.
Walter Stillman Martin died in 1935.