Person

Dihya al-Kalbi

ضياء الكلبي
Lifespan unknown

Dihya al-Kalbi was a companion of Muhammad from the Banu Kalb tribe, known for his role as an emissary to the Byzantine emperor.

Significance

Companion of Muhammad and purported emissary to Byzantine emperor Heraclius

Reputation in tradition

praised
Sources: Wikipedia and classical Islamic biographical literature compiled by automated researchers. Every page is being continuously refined — if something looks off, please check back in a few days.