I can identify some of them (they were used in your illustrations in this gallery); but one or two are strange to my. However they are very well painted. Congrats.

At first glance I see a wicker shield (possibly Median or similar), a bamboo shield (East Asian), an undecorated scutum (Roman), A Hoplon (Greek), A peltasts shield (by which the peltast is actually named after), "Barbarian"/Celtic oval shield, and several generic "small round" shields.  

Superb artwork may I add.

Knights (from All Empires)