no
Black widow spiders are called such because the females eat the males after mating with them.
After mating, she usually kills and eats her mate. She's black and now has no 'spouse' so she's a black widow. But it is not any more or less usual for the black widow to eat her mate than it is for...
They are called widow spiders because after they mate the female eats the male spider
because the female eats the male after breeding