Good fortune, luck, or a record-keeper
A rare variant of Chance, it likely derives from the Middle English 'cheaunce' meaning luck or fortune. It can also serve as a shortened form of Chancellor, an English occupational surname for an official or record-keeper. In modern usage, it is often chosen for its association with destiny and positive risk.
Less common today
Chanc isn't in the latest US Top 1000. It last peaked at #6,076 in 1994.
US births per 5-year period, 1990βpresent (SSA data).