Yeah, what Space Oddity said. Philip offered his daughter, but the Estates General and moderate Leaguers aren't going to accept it. The only ones who really saw the Infanta as a potential Queen were the hardline members of the League. As stated, there are the various men of Guise branch of the House of Lorraine another idea might be the Duke of Lorraine himself, Charles III? He had been married to Claude of France, thus all his children were the grandchildren of Henri II, much as Infanta, but he's a male, and he's also unmarried in 1589, although he has two sons so his succession is secure, but if say, he needed to marry to secure his candidacy, it's an option.