I can't find an example of the first one, but it might be
Goodwin type H Pseudo-Byzantine coin, which has a bearded
bust obverse.
Type H is not illustrated in
Sylloge of Islamic Coins in the Ashmolean, Volume 1. Looks like I might have to break down one of these days and buy Goodwin's new book on
Arab-Byzantine coins.
The second one is a regular
Arab-Byzantine coin, showing the standing emperor. It was minted at Hims (
Emesa). It matchs
SICA 537/
The last coin is another Pseudo-Byzantine coin and it is
Goodwin Type E. It matches
SICA 525.