"The name "cockroach" comes from the Spanish word for cockroach, cucaracha, transformed by 1620s English folk etymology into "cock" and "roach". The scientific name (Blattodea) derives from the Latin blatta, "an insect that shuns the light", which in classical Latin was applied not only to cockroaches, but also to mantids." - wikipedia
If anyone was actually curious, but too lazy to google
If anyone was actually curious, but too lazy to google