“Le bilinguisme arabe-français au Liban”, by Sélim Abou, Presses Universitaires de France, 1962 says this
“Garçons : Collège Notre-Dame de Jamhour (Jésuites)”.
If it was a boys’ school in 1962, it was in the 1950s.
OK.
Knew I had it somewhere. The J’s didn’t teach girls when I was a kid. The girls got terrified by penguins instead, Ursulines and carmelites mainly.