Definition & Meaning of "every Jack has his Jill"

What is the origin of the proverb "every Jack has his Jill" and when to use it?

The origin of the proverb "every Jack has his Jill" is believed to come from traditional nursery rhymes and folk songs, with the phrase first appearing in the 17th century. In these rhymes and songs, "Jack" and "Jill" were often used as generic names for any boy or girl, representing common, everyday people. The proverb suggests that everyone has a suitable partner, particularly in romantic relationships, emphasizing that there is someone for everyone and no one is truly alone when it comes to finding companionship. It is commonly used to convey the idea that love or partnership is a natural part of life and that everyone will eventually find their match.