REMOVE

1. Arabic
2. Abu 'l-Baka
3. Abu 'l-Faraj

WHAT

1. Hebrew (1)
2. Letters (1)

WHO

1. Abu 'l-Baha (1)
2. Abu 'l-Karam (1)
3. Harun (1)

WHEN

1. 12th-13th century? (1)