It means great.
The prefix that has the same meaning as "great" is "mega-".
Caterina Magni was born in 1966.
Nicholas Magni was born in 1335.
Nicholas Magni died in 1435.
Mega- and magni- mean big; giga- means gigantic.
Fiorenzo Magni was born on December 7, 1920.
Fiorenzo Magni was born on December 7, 1920.
Pietro Magni - sculptor - was born in 1817.
Pietro Magni - sculptor - died in 1877.
Magni Ásgeirsson was born on 1978-12-01.
Pietro Magni - engineer - was born in 1898.
Pietro Magni - engineer - died in 1988.