#3 The Smith's

The lineage of the Smith last name, at least as it applies to the family we're referring to, isn't well-known at all, perhaps because the children of former professional wrestler Grizzly Smith didn't want to promote their relationship with him.
One of the greatest personas and most technically refined wrestlers to ever lace up wrestling boots was Jake ‘The Snake' Roberts, a character that was ahead of his time in so many ways. He was so good at presenting his devious and dark character that the fact he didn't hold any championships during his time in WWE or WCW didn't matter.
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What is not well-known about Roberts was that his brother and sister were active wrestlers as well. In fact, they were also in WWE but didn't use the ‘Roberts' name.
Roberts' brother competed under the name Sam Houston, a cowboy-influenced character that was about as clean cut a babyface as there was. His sister competed for the WWE women's championship under the name ‘Rockin Robin'.