From Wikipedia: Coccinelid is derived from the Latin word coccineus meaning "scarlet".The name "ladybird" originated in Britain where the insects became known as 'Our Lady's bird or the Lady beetle.Mary (Our Lady) was often depicted wearing a red cloak in early paintings,
and the spots of the seven-spot ladybird (the most common in Europe)
were said to symbolise her seven joys and seven sorrows. In the United States, the name was adapted to "ladybug". Common names
in other European languages have the same association, for example, the
German name Marienkäfer translates to Marybeetle.