Irby and Mangles, writers, [92]

Isabella of Spain, [166]

Isaiah, monk, [101]

Isaurus, monk, [130]

Ishmael, [46], [47]

Ishmaelites, [47], [95], also [Saracens].

Isidorus, writer, [109]

Israelites in Sinai, [64] ff.

Jacopo, writer, [155], [158]

Jacques of Vitry, writer, [147]