Certie
The Century Dictionary and Cyclopedia
noun.
A word used only in the phrases
by my certie, my certie
, a kind of oath, equivalent to
by my faith, by my conscience
, or
in good troth.
Wiktionary, Creative Commons Attribution/Share-Alike License
noun.
certes
;
verily
Word Usage
"But my certie, lad, thought I, times are changed since ye came fleeing down the back stairs of auld"