Bill and Melinda Gates may be the world's richest couple with a combined net worth of $35 billion, but they're far from the only billionaires with deep pockets.
A Forbes list of the world's richest families also reveals some who are giving away a lot of their money in "strategic philanthropy."
The list is based on giving "with intention, purpose, and structure," according to the Giving Pledge website.
Here are the top 10 richest families with a combined net worth of at least $35 billion:
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