Did you by any chance mean knower?
Examples
“I've knowed 'em these thirty year -- right down _knowed_ 'em.”
“He was the only man I ever 'knowed' in all my life from girlhood up.”
“I was halted by a soldier who "knowed" his business.”
"Co. Aytch" Maury Grays, First Tennessee Regiment or, A Side Show of the Big Show
“But her voice was so soft and quiet that you kind of knowed before you seen her how she orter look.”
“I made haste, lad, as you said, an 'got there first, an' done the good deed, an 'knowed 'twas a good deed; an' I been a sight happier ever since -- though I'm woebegone enough, God knows!”
Harbor Tales Down North With an Appreciation by Wilfred T. Grenfell, M.D.
“I ha'n't liked his not carin 'to work plantchette since he got back; looked to me from the start that he kind of knowed that it wa'n't worth while for him to trouble about a world that he'll know all about so soon, anyways; and d' you notice he don't seem to care about Mars, either?”
“I ought to ha 'knowed "-- wildly --" he would ha' knowed whether I wor true or false, poor chap -- he would ha 'knowed. ”
“I ought to ha 'knowed "-- wildly --" he would ha' knowed whether I wur true or false, poor chap -- he would ha 'knowed. ”
“Can't Post | Private Reply lissen you 'bama hiccup, i forgotten more about beef then you ever knowed. that there pic is worth a 1000 of yer worthless words ta anyone else that knows beef. now i gotta go check my bbq after just putting on the hy's season salt and garlic powder. i don't wreck good beef like you does.”
“I knowed he couldn't last that way, and I just laid down an 'did my dangdest.”
Lists
These user-created lists contain the word ‘knowed’.
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Appalachian colloquial interpretations
words often used or misused by my hillbilly and redneck friends...
hosepipe, minner, minner-cheese, kindly, chimley, sammich, rat cheese, store cheese, mater, purdy, heifer, knowed and 30 more...
Tweets
Looking for tweets for knowed.

granny as in, "I knowed dat!" Apr 2, 2007