Generally speaking, even those with only a mild interest in onomastics feel that they can usually pinpoint the national or ethnic origin of individuals imply by hearing their names. This becomes doubly so when the first and last names fall into the same presumed stereotypical category. For example, who would fail to recognize that Werner Schmidt was of German background or that Erin O'Flaherty was Irish?
Bernard, Thomas L.
Word Ways: Vol. 28
, Article 19.
Available at: http://digitalcommons.butler.edu/wordways/vol28/iss3/19