Oskar Heil was born in 1908.
Yes. Please see the link.
Julius P. Heil died in 1949.
Daniel van Heil died in 1664.
Theodore van Heil died in 1691.
Jan Baptist van Heil died in 1685.
Oskar Lebeck died in 1966.
Oskar Spate died in 2000.
Oskar Awejde died in 1897.
Oskar Jæger died in 1933.
Oskar Böhme died in 1938.
Oskar Langendorff died in 1908.