Karl Groos was born in 1861.
Karl Groos died in 1946.
Friedrich Groos was born in 1768.
Margaret Groos was born in 1959.
David Groos was born on 1918-04-20.
Kaare Steel Groos was born in 1917.
Wolfgang Groos was born on April 22, 1968.
Friedrich Groos died in 1852.
David Groos died on 1976-01-12.
Kaare Steel Groos died in 1994.
Yes
Karl Martin was born in 1851.
Karl Lunde was born in 1892.