What's the Kennection? #290

In the Bible, "Nazirites" like Samuel and John the Baptist vowed to refrain from cutting what?

What kind of animal has a pupal stage called a chrysalis?

What Colm Toibin bestseller is about Eilis Lacey, who emigrates from Ireland to the title borough?

In both the Grumpy Old Men movies, the title characters are rivals at what shared hobby?

In what Olympic sport did Kerri Walsh Jennings and Karch Kiraly each win three gold medals?

What's the "Kennection"?