'Gather Ye Rosebuds While Ye May' by John William Waterhouse

I’ve also done 0 research, but I assume the name refers to the opening lines of a pretty famous poem, which is using “ye” to address a group of people; basically the poem is saying “go get some while you’re young and hot”

Ye means You/Your/Yours

Ye olde pizza hut = your old pizza hut

In this its "Gather your rosebuds while you may"