So-called "superscript contractions" used to be a common practice in English, when handwriting was much more common, but it is now considered obsolete.
This Cambridge course on early Modern English handwriting gives the following advice to students:
superscript characters, often a form of contraction which may imply preceding omitted characters, as in wch for 'which'. Other common contractions of this type include yr for 'your' or 'yowr'; Sr for 'Sir' and Mr for 'Master'; wt or wth for 'with' (and wthout for 'without'); maty for 'maiesty' or maties for 'maiesties'; and words ending in -mt for '-ment', such as gouernemt for 'gouernement' or parliamt for 'parliament'.
Wikipedia glosses over this practice, giving nothing useful to quote.
This practice also extended to personal names, for example J os for Joseph or Wm for William. The following excerpt from an 1877 land atlas contains at least 3 examples that I can see:
It was mostly an artifact of handwriting, occasionally printed, but fell out of use with automated typesetting. Nowadays you see them in only a few places such as ordinals (1st , 2nd , 3rd ) and special symbols such as the TrademarkTM symbol.
So to actually answer your question, a few people might recognize what you're trying to do, but they would find it odd or contrived. The rest would just be confused.