I’ve seen **Fern Forest’s ** explanation before, but it seems a little too pat on the one hand and complex on the other.
We named our sons Jason and Aaron after a lot of research and thought; we actually thought Jason was unique because we’d never known anyone with that name before, and because of its religious and heroic connotations. Imagine our surprise when three other boys in his Kindergarten class had the same name!
My personal theory is that names like Brittany (Britni, Britney, etc.) and Tiffany (Tifini, Tiffani, etc.) got chosen because the sound appealed to middle-class ears. Tiffany evokes an image of glamor, quality and beauty; Brittany evokes the image of a beautiful region of a beautiful nation that is equated with culture and high fashion. New parents of the Boomer generation liked the sound of the names and sought to distinguish them only by changing the spelling.
Some name groups have popularity among certain cultural groups, possibly because young parents want their children to fit in when they grow up. Here in the West, we see a lot of Codys, Travises, Tylers and Treys wearing Stetson hats and cowboy boots. Black Americans have come in for a lot of ridicule for the “made-up” names they have given their children over the past couple of decades, but that seems to truly be an attempt to come up with culturally distinctive names that do, in fact, identify the person as part of that ethnic group. The names evoke the person’s African heritage and instills pride in that heritage.
Even the increasingly common practice of trans-gendering of girl’s names (Morgan, Taylor, Sydney/Sidney, Kendall, etc.) and using what once were considered strictly family names for first names (Madison, Kennedy, Mackenzie, etc.) is, IMHO, an attampt at sexual and cultural egaltarianism.
I could be wrong about all of this, of course – it could just be the world’s greatest coincidence.