(note that you must press search lots of books after clicking on the link.) and since lil is a very popular name (both as a first name and as a hyphenated portion of an apparently arabic name), any ngram results for that variant must be ignored But as @sumelic points out, the ngram results are highly suspect, due to the. Abbreviation is usually the practice of writing a shortened word to save space on paper, or effort on the part of the writer For example i might write instr. as an abbreviation for instrumental, or vb. as an abbreviation for verb Some abbreviations do indeed contain apostrophes It is not usually expected that people would pronounce these words out.
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