The Lefebvre family was a family of famous organ builders in 17th and 18th century Normandy, France.
The last name has occasionally been written as Lefèvre.
Clément was father of Charles Lefebvre and a well-known organist in Rouen.
[1] JBNL was son of Charles Lefebvre, was one of the most famous European organ makers of the 18th century, building giant organs with five keyboards.
[4] Louis-Charles Lefebvre was son of Charles Lefebvre.