How do you call front-matter data from one page into another page/template

Hi, I just have a case where I wanna call front-matter data from a page into another page and I haven’t had that case before and have no clue how to.

What I mean is, say I have a page called join.md. Now in the layout page for this “Join” page, the variable page is available to me. So, I could call a parameter, say title thus page.title. But how do I call this same title for example, from this “Join” page into another page/template?

Anyone? Is there a solution other than such a loop as @budparr suggests here?

Thanks.