Nymeria - is sounds cute with mate name Cymeri and Nymeria
Stellazia - It means Stellar and would work best with Cosmos (Space).
Tempesta - She looks like a storm dragon to me so Tempest would be best
Cirrus - like the Cirrus Cloud since his mate is Azure they would be like Blue Cloud. He looks Fluffy BTW
Stronghold - He looks very strong and steadfast... thus the name
1. Pluma (latin for feather)
2. Iridis (latin for rainbow)
3. roseus (latin for pink)
4. Aerius ( latin for air or soaring)
5. Noctis (latin for midnight)