just wondering why

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Okay I'm responding to this even though it's really old cause other people may want to know and I just looked it up. According to wikipedia, Ernie Lively (Robyn's stepfather) took his wife's last name (which was actually the last name of her first husband). It is kind of weird but that explains it. I guess Robyn's mom wanted to keep Lively as her last name since she already had 3 kids? Not sure why her new husband would take her last name but he did. Amusing to me they have this Lively name being carried on when Blake and the other son are not actually related to Ronnie Lively (the mom's first husband).