Definition of "godsib"
godsib
noun
plural godsibs
(chiefly historical or anthropology) One's sibling or kin via a godfamily tie: one's or one's child's godparent, or one's godchild's parent, or one's godparent's child.
Quotations
[…] where 34 % of testators who mentioned godchildren were homonymous with those godsibs.
2006, David Postles, Joel Thomas Rosenthal, Studies on the Personal Name in Later Medieval England and Wales (Western Michigan Univ.)
The most important people in the baptismal party that processed from Newbold Revel to the church porch were the three people who had undertaken to support the baby's introduction into the Christian faith. […] Godsibs, as godparents were called, were chosen with care and took their responsibilities seriously. […] since a baby was almost always given the Christian name of the most important godsib, his name must provide a clue.
2007, Christina Hardyment, Malory: The Knight Who Became King Arthur's Chronicler, Harper Collins, page 50
Holinshed's Chronicle says: 'James Earl of Desmond being suffered and not controlled, during the government of Richard Duke of York his godsib and of Thomas Earl of Kildare his kinsman, did put upon the King's subjects […] '
2013, Edmund Curtis, A History of Medieval Ireland (Routledge Revivals): From 1086 to 1513, Routledge, page 306