I'm 99.9% sure that it's not a Hebrew name. I've never heard of it, and it doesn't follow the structure usual to Hebrew (and even Yiddish) names. It's definitely a surname, though, and this is was House of Names had to say about it:
http://www.houseofnames.com/fc.asp?sId=&s=Saide
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'Sometimes I swear Mama steals her material from me.'