Julia Mamaea Empress of the Roman Empire from 222 to 235.
Julia Avita Mamaea was a Roman regent.

When Elagabalus and his mother Julia Soaemias proved incompetent rulers, imperial favor fell on Alexander, Julia's son. He became emperor in 222, following Elagabalus' murder by the Praetorian Guard.

Julia and her mother became regents in the name of Alexander, then 14 years old. He never managed to escape her maternal domination, but at first Julia ruled very effectively.

In 232, Alexander so alienated the legions by his lack of military prowess and his inflexibility towards pay that the troops proclaimed Maximinus Thrax as emperor in 235.

The troops sent to kill Alexander found him clinging to his mother in a tent. Mother and son were butchered together, ending the Severan dynasty.
Julia Mamaea
/Files/Images/Coinsite/CoinDB/1091_Julia_Mamaea_Alexandria.jpg
An BL Tetradrachm struck 233-234 AD in Alexandria
Obverse: diademed and draped bust right; IOYΛ* MAMAIA CEB__MHTE CEB K CTP

Reverse: Elpis standing left, wearing chiton, holding flower and her dress; palm branch left; L IΓ

Diameter: -
Die Orientation: -
Weight: 13.9 g
29 Aug 233 - 28 Aug 234 AD The legend looks more like IOY A MAMAIA ... This legend (with A) is not documented anywhere even when her full name was Julia Avita Mamaea. That means it is engraver's error most probably.
Geißen: --, Milne 3141 var., Dattari: 4484 var.
/Files/Images/Coinsite/CoinDB/Mamaea.jpg
An AR Denarius struck 222 AD in Rome
Obverse: IVLIA MAMAEA AVG, Diademed and draped bust right

Reverse: IVNO CONSERVATRIX, Juno standing left with patera and sceptre, peacock at feet left

Diameter: 0 mm
Die Orientation: 0 H
Weight: 221 g
No notes for this coin
RIC 343
/Files/Images/Coinsite/CoinDB/40_IMG_0529.jpg
An AR Denarius struck 222 AD in Rome
Obverse: draped bust right; IVLIA MAMAEA AVG

Reverse: Juno standing left, holding patera and scepter, peacock at feet left; IVNO CONSERVATRIX

Diameter: 19 mm
Die Orientation: -
Weight: 2.68 g
11 Mar - 31 Dec 222 AD
RIC IV 343, RSC III 35, BMCRE VI 43, SRCV II 8212
/Files/Images/Coinsite/CoinDB/Julia_Mamea_Vesta.jpg
An AR Denarius struck 227 AD in Rome
Obverse: draped bust right; IVLIA MA_MAEA AVG

Reverse: Vesta standing left holding patera and scepter; VES_TA

Diameter: 20 mm
Die Orientation: -
Weight: 2.9 g
No notes for this coin
SRCV II 8218, RSC III 85, RIC IV 362
/Files/Images/Coinsite/CoinDB/674_Mamaea_Felicitas.jpg
An AE Sestertius struck 230 AD in Rome
Obverse: draped bust right; IVLIA MAMA_EA AVGVSTA

Reverse: Felicitas seated left holding caduceus and cornucopiae; FELICI_TAS PVBLICA / S C

Diameter: -
Die Orientation: -
Weight: 19.84 g
No notes for this coin
RIC IV Sev. Alex. 679; Cohen 26, BMC 661
/Files/Images/Coinsite/CoinDB/Julia_Mamaea_(Obv_and_Rev)(0).jpg
An AR Denarius | Denarius Serratus struck AD 222 in Rome
Obverse: IVLIA MAMAEA AVG, draped bust right

Reverse: IVNO CONSERVATRIX, diademed and veiled figure of Juno standing left, holding patera and sceptre; at her feet, peacock

Diameter: 20 mm
Die Orientation: 12 H
Weight: 2.79 g
No notes for this coin
RIC 343 (Alexander); RSC 35; Sear 8212
/Files/Images/Coinsite/CoinDB/1535_Julia_Mamaea_Kolybrassos.jpg
An AE unit struck 222-235 AD in Colybrassus
Obverse: bust right diademed draped; ΙΟΥΛΙΑ__ΜΑΜΑΙΑ

Reverse: Athena standing left, holding spear and shield; tree behind; ΚΟΛΥΒΡ_Α_ϹϹEΩΝ

Diameter: 23 mm
Die Orientation: -
Weight: 10.6 g
No notes for this coin
RPC VI, 6250 (temporary); SNG Pfalz 755