Was "rhythm" once spelled "rhythmn"?

Apparently it was and sometimes it still is.

Here’s a usage of that spelling from here:
“There is no description of the pre-operative condition of the patients concerning cardiac rhythmn”.

It also seems plausible me because of the similar spelling of hymn.

I remember it being spelled that way. A 7 letter word with no vowels.

I believe it is just a misspelling.

I have the same question about dilemma. I could have sworn when I was growing up it was spelled dilemna

I also have a memory of my first or second grade teacher spelling it that way.

The OED says no. But I also remember this. I think perhaps there’s a school out there teaching primary education students incorrect grammar and spelling so that new little second and third graders will be forever confused as to the proper rules of the English language. It’s diabolical!

It’s a misspelling, perhaps prompted by the model of “hymn” and “column” and a few other words. There’s no n in its roots or its history.

Teachers can make mistakes. Many do.