Treherne - a bellfounder?

[Carl Scott Zimmerman]

What is perhaps the oldest bell in the city of Philadelphia, 
Pennsylvania, USA, bears the simple inscription "TREHERNE 1711".  I 
can find no record of this name appearing on, or associated with, any 
other bell in this country, nor in any source of information about 
American bellfounders.  Nor does it appear in the list of 
bellfounders for Dove online.

Does anyone have any idea of the possible origin of this name?

Carl