Not a pine..
Not an apple...
What’s up with that??
I don’t know what they call it in the native languages of the countries it comes from; but we probably named it Pineapple because it resembles a pine cone; and many fruits have been named ‘apple’ by Europeans - the word ‘pomme’ in Old French, originally simply meant ‘Fruit’.
Potatoes are ‘pommes de terre’, or ‘earth apples’; and ‘pomme d’amour’, is the tomato -’love apple’.
By the way, the Pineapple has long been a traditional symbol of Hospitality in the US, since Colonial times; and you’ll see it represented in lots of the decor and art of that time:
http://www.history.org/almanack/life/christmas/dec_pineapple.cfm