T9C

This very rare name is an exception to the rule that numerals are normally not allowed as part of the spelling of names in the United States. It's a creative rebus-like spelling of a slang intensive term for "tiny" found in the Southwestern United States. Most Americans would be familiar with terms like "teeny-tiny", "teensy-weensy", etc. "Teeninecy" is a rare variation of these that's found in the Deep South, and as a rare slang term it doesn't have a set spelling, with teeninesy, teeninetsy, teaninesea, and many others being found. Though a couple of other spellings have been used as names, T9C seems to be the most common in that role. It probably began in Texas in the 19th century as the earliest examples found so far are from that state.