I would argue that Hans Jansen and Dennis Ens (and Jigar Kumar? I don't know about Indian perceptions of names) are a a bit off as well. They contain rhymes that make them sound slightly silly. Most parents would want to avoid these. Maybe chosen to avoid matching real people while still seeming commonplace.

So these names seem somewhat similar to "Jia Tan" in their almost-but-not-quite real quality.