My parents weren’t frum when I was born*, and hence I have an English name and a Hebrew name.
As I grew up, I found that there were discrepancies in what people thought their Hebrew names were and what they actually were (including my father — from the time I was 13 until I got married at 21, I was called up to the Torah as X ben Y — but it turned out that my father’s name was Z, not Y).
In order to prevent any such confusion for the future generations, my kids have only Hebrew names. If they (or any future generations) have any doubts as to what their names are, all they have to do is look at their birth certificates.
The Wolf
* I can hear some of you now saying “Ah, that explains it. He’s a ben niddah. That’s why he’s an apikorus and a rasha!” 🙂