According to the 1990 US Census, the most common last name was Smith (2.7 million people had this as their last name).
Sources:
http://genealogy.about.com/library/weekly/aa_common_surnames.htm
The most common last name in the English language is "Smith". It is of Anglo-Saxon origin and has been a popular surname for centuries.
The most common language spoken in Mississippi is English.
English is the most common language spoken in Alaska.
English is the most common language spoken in the northeast region of the United States.
The most common language spoken in Maine is English.
The most common language spoken in Florida is English. Spanish is also widely spoken, particularly in areas with large Hispanic populations.
the most common language in the US is English
E is the most common letter in the English language.
the most common figurative language (s) are English and Chinese.
Irish Sign Language is the second most common non-English language in Ireland.
english
ENGLISH!
Mandarin Chinese is the most common language in the world based on the number of native speakers. It is spoken by over a billion people globally.
The most common language spoken in Maine is English.
English is the most common language spoken in the northeast region of the United States.
English
Spanish is not the most common language in the world by number of native speakers. It ranks second or third, after Mandarin Chinese and possibly English, depending on the criteria used to measure language prevalence.
E ! As in "Erik Estrada". The most common letter is E !