Shevaun

Perhaps users self-identify as being African American, and hence historically having been greatly influenced by a high degree of illiteracy in early generations that ultimately led to a specific dialect (of sorts). Because there is nothing Anglicised about this form whatsoever, if one insists on deviating from the native variants I would suggest Shevaughan as a much more "authentically absurd" variant than Shevaun!

I really don't like this spelling. Doesn't look that feminine to me.

Do not use this spelling for your children unless you want your child to go through life with everyone thinking they were born to barely literate parents.

Looks tacky and unfeminine.

I just don't like the sound of this name, no matter how it's spelt. There are quite a lot of Shevons and Chevawns. It's a name you would never ASK about.

A terrible thing to do to the beautiful, natural, wholesome Siobhán. Please take a Respect For Language/Names course.

I take it you also have a problem with Shavonne and Shevon? Is an Anglicization of an Irish name (for non-Irish speakers) really so offensive to you?

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Personally, I don't find much wrong with the variant Shevaun, although Shavonne is by far my favorite, and the most elegant. The only one I don't like is Chevonne, because (to me) the 'Ch' start implies a different pronunciation.