Age at Naturalization?

If your ancestor naturalized in his own right (as opposed to becoming a citizen when his parent naturalized), have you thought about how old he was at the time and how long he had lived in the new country when he naturalized?

I recently remembered that an ancestor of mine was twenty-one when he naturalized in 1879, but I never gave much thought to how old the others were when they naturalized.

Of course to naturalize in their own right an alien had to be of the age of majority at the time of naturalization.

This might be something for me to think about.