WHATISIT? - ID HELP, PLEASE.

I will be extremely grateful for any information you can provide, to enable me to fully ID the following Julia Domna (?) coins. Please e-mail me if you can help.

 

Text Box: AE 20. (3.50 gms) IVΛ  ΔΟΜΝΑ CEBACTH Draped bust right ? Athena facing left, with spear & shield Text Box: AE 30. (16.90 gms) ? Draped bust right ? ? Text Box: AE 21. (7.50 gms) IOVΛΙΑ ΔΟΜΝΑ Draped bust right ? Coiled snake, head right