I don't know the exact date but it was in 1973, sorry
Jacob H. Neff was born in 1830.
Jay H. Neff was born in 1854.
Jacob H. Neff died in 1909.
Jay H. Neff died in 1915.
Wallace Neff was born in 1895.
Lyle Neff was born in 1969.
Christophe Neff was born in 1964.
Vladimír Neff was born in 1909.
Tom Neff was born in 1953.
Ondřej Neff was born in 1945.
Heather Neff was born in 1957.
Felix Neff was born in 1798.