Cyna is a short form of an Anglo-Saxon masculine name commencing with cyn (kin).
Cyna [Joseph Stevenson 1841 Liber Vitæ Ecclesiæ Dunelmensis, page 12].
Cȳna [Henry Sweet 1886 The Oldest English Texts, page 639].
Cina [Herbert Grueber 1893 A Catalogue of English Coins in the British Museum, Anglo-Saxon Series 2: 198].
Cuna [Herbert Grueber 1893 A Catalogue of English Coins in the British Museum, Anglo-Saxon Series 2: 198].
Cunna [Herbert Grueber 1893 A Catalogue of English Coins in the British Museum, Anglo-Saxon Series 2: 198].
Cynna [Herbert Grueber 1893 A Catalogue of English Coins in the British Museum, Anglo-Saxon Series 2: 198].
Cyn(n)a [Mats Redin 1919 Studies on uncompounded personal names in Old English, page 47].
Cʏɴ = Kɪɴ, kindred, lineage, race, posterity, tribe, nation, people, kind, sort [Joseph Bosworth 1838 A Dictionary of the Anglo-Saxon Language, 1st edition, page 85].
— a = termination of pet names, such as Cutha for Cuthwine or Cuthwulf [William Searle 1897 Onomasticon Anglo-Saxonicum, page 1].
Cynna was the mark of a moneyer working at Winchester during the reign of King Æthelræd II (Unræd): “✠CYNNA MΩʘ ᚹINT·” [Herbert Grueber 1893 A Catalogue of English Coins in the British Museum, Anglo-Saxon Series 2: 240, number 380].