From en.wiktionary.org:
[cobble]
** English
*** Etymology
- As an English surname, variant of [en] .
- As a [en] surname, Americanized from [en] .
*** Proper noun
[Cobbles]
1. [en] .
**** Statistics
- According to the 2010 United States Census, _Cobble_ is the 17097 <sup> th </sup> most common surname in the United States, belonging to 1660 individuals. _Cobble_ is most common among White (83.98%) individuals.