Tranquillina Empress of the Roman Empire from 241 to 244.
Furia Sabinia Tranquillina was the Empress of Rome and wife of Emperor Gordian III.

In 241 her father was appointed the head of the Praetorian Guard by the Roman Emperor Gordian III. In May that year, Tranquillina had married Gordian.

She became a Roman Empress and received the honorific title of Augusta. Her marriage to Gordian was an admission by the young emperor of both Timesitheus' political indispensability and Tranquillina’s suitability as an empress.

While Greek Imperial - Provincial - coins of Tranquilina are plentiful, Roman Imperial issues are much more scarce.
Tranquillina
Marble bust of Tranquillina at Museo Chiaramonti in the Vatican
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An AE unit struck 242 - II 244 AD in Singara
Obverse: Laureate, draped and cuirassed bust of Gordian III right from behind, confronting draped bust of Tranquillina left wearing stephane; AVTOK K M ANT ΓOPΔIANON CAB TPANKVΛΛINA CEB

Reverse: City goddess left seated on rocks, holding branch; Centaur Sagittarius above; river-god swimming below; AVP CEΠ KOΛ CINΓAPA

Diameter: -
Die Orientation: -
Weight: 17.4 g
No notes for this coin
BMC Arabia 8, SGICV 3804
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An AE unit struck 241-244 AD in Anchialus
Obverse: [AΥT K M ANT Γ]OΡΔIANOC AΥΓ CAB / TΡANKΥΛ / ΛINA, confronted busts of Gordian III and Tranquillina

Reverse: OΥΛΠIANΩN - AΓXIAΛEΩN, Tyche standing l., holding rudder and cornucopiae.

Diameter: -
Die Orientation: -
Weight: -
Gordian III and Tranquillina
Varbanov II, 735
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An AE Pentassarion struck 238-244 AD in Odessos
Obverse: AVT K M ANT ΓOPDIANOC AVΓ CE TPANKVΛ-ΛEINA: Confronted busts of Gordian on left, laureate, draped and cuirassed, and Tranquillina on right, draped and wearing stephane

Reverse: OΔHCCЄITΩN: Nemesis standing left, holding wand over wheel, and sceptre.

Diameter: 26 mm
Die Orientation: 1 H
Weight: 13.54 g
No notes for this coin
AMNG I, 2394; SNG Copenhagen 687; Varbanov 4583-6
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An AE unit struck V 241 - 244 AD in Tarsos
Obverse: Draped bust on crescent right wearing stephane; CABINEIAN TPANKVΛΛEINOAN C_E_B / Π_Π

Reverse: City goddess (Tyche?) seated on rocks left, holding grain ears, below river god Cydnus swimming left; TAPCOV MHTPOΠOΛEΩC / A/M/K _ Γ/B

Diameter: -
Die Orientation: -
Weight: 15.9 g
No notes for this coin
unique?, obverse: SNG France 1725, Gorny and Mosch 156-1821, CNG 93-936
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An BL Tetradrachm struck 242-243 AD in Alexandria
Obverse: Draped bust right wearing stephane; CAB TPANKVIΛΛEINA CEB

Reverse: Homonoia standing half left, raising right hand, holding double cornucopia; L S

Diameter: -
Die Orientation: -
Weight: 12.2 g
29 Aug 242 - 28 Aug 243 AD
Köln 2688; Dattari (Savio) 4823; K&G 73.20; Emmett 3449.6
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An AE unit struck V 241-244 AD in Samos
Obverse: draped bust right wearing stephane; ΦOVPIA TRA_NKVIΛΛINA CEB

Reverse: Tyche facing, head left, wearing kalathos, holding rudder and cornucopia; CAM_IΩN

Diameter: -
Die Orientation: -
Weight: 4.4 g
May 241 - 244 AD
SNG Copenhagen 1766; BMC 311; RPC VII 596; SNG Lindgren 599.