I'm working on pre-1850 Irish HITCHCOCK(E)s, some of whom apparently descended from HITCHCOCKs who came from Preshute, Wiltshire.
I've found two brothers: John (b c 1592) and William (b 1601). The former had at least one son: George. The latter had two sons (among other children): William and Edward.
The elder William HITCHCOCK was a Cromwellian Adventurer and a Merchant Tailor. His will was proved in 1661. His wife's maiden name was Hester Luther.
I wonder if this family is connected to your Richard HISCOCKES?
I've posted additional details on the Vocal@Local Boards for Counties Dublin and Laois.
West Los Angeles