Where by a date is not recognised just, "c. " could be useful for "circa". Other illustrations are provided at WP:APPROXDATE, Despite the fact that "fl. " for "floruit" must be averted as It isn't universally comprehended. Generations should not be abbreviated "c. " due to probable for confusion with https://andresgyodr.mysticwiki.com/1500036/the_single_best_strategy_to_use_for_short