Hi Vicky! Very interesting! Well, I can tell you that there were a slew of Kollocks who were in the Sharon, MA area but I do not have any information on a Guild/Kollock marriage.
There was an Abby Kollock Allen b.1824 in Mansfield,MA she was the daughter of Oliver Allen and Martha "Patty" Guild.I can find information on Olivers parents but not on Martha Guilds Parents.Allens lines go back to Sharon but it does not show any Kollocks so I suspect that possibly Marthas mother was a Kollock.Reason being all of their 8 children had family names from looking at the names of folks in Oliver Allens family and Abby got the middle name Kollock from somewhere and it does not appear to be from the paternal side.
Otherwise I have an Elizabeth Kollock married to a Nathaniel Gould.She was born 1766 in Sharon, MA.Her parents were Royall Kollock and Mary Randall.I have Nathaniels father listed as Jeremiah Gould.I do not know though if there was any deviation on the spelling of the name Guild to Gould.
My hunch is that the answer lies in the parents of Martha "Patty" Guild.I am willing to bet her mother was a Kollock.
If you find anything let me know...Good Luck! Melissa