Ludica is a diminutive form of an Anglo-Saxon masculine name containing lud (loud)
Ludica [Rogers Ruding 1817 Annals of the Coinage of Britain and its Dependencies, 1st edition, 3: 220].
Ludeca [John Kemble 1839 Codex Diplomaticus Aevi Saxonici 1: 277].
Ludiga [Charles Keary 1887 A Catalogue of English Coins in the British Museum, Anglo-Saxon Series 1: 46].
Ludig [Herbert Grueber 1893 A Catalogue of English Coins in the British Museum, Anglo-Saxon Series 2: 33].
Lud = loud [Joseph Bosworth 1838 A Dictionary of the Anglo-Saxon Language, 1st edition, page 221].
‘Amongst the Goths, as among all other peoples, diminutives or “pet names” were formed from ordinary pet names by shortening them and adding an affix. This affix was usually -ila but sometimes -ika’ [Henry Bradley 1888 The Goths, page 370].
There was a King of Merica called Ludica [William Searle 1899 Anglo-Saxon Bishops, Kings and Nobles, page 298]: “✠LVDICAR✠ HE” [Charles Keary 1887 A Catalogue of English Coins in the British Museum, Anglo-Saxon Series 1: 42, number 116].