Yes, Whitebark Pine and Yew are related; they belong to two different families (out of six to eight families) that make up the Conifers.

The Monterey Cypress (think: Lone Cypress) and the Sequoia (General Sherman Tree) are also conifers.

Interesting lore about Yews: they are commonly planted in cemeteries due to legend of keeping away the bad spirits (goes back to the Druids and probably before)
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The body betrays and the weather conspires, hopefully, not on the same day.