r-Graphemes

The so-called r rotunda is represented by the Unicode entity ꝛ (U+A75B, LATIN SMALL LETTER R ROTUNDA). It is often found in connection with the nowadays common r or as an substituent for et in abbreviations for et cetera.

Example (r rotunda as contemporary r and et):

Original Transcription
Herr (with r rotunda) Herꝛ
etc. (with r rotunda) ꝛc.