The William "Whetny" birth record is:
The transcription of this record, in the 1683 records (right-hand page of first image) is:
"William Whetny son of Nathaniell & Sary Whetny
Borne the 6 of May"
The source citation for this record is:
"Massachusetts, Town and Vital Records, 1620-1988," digital images, Ancestry.com (http://www.ancestry.com : accessed 13 August 2013), Watertown > Births, Marriages and Deaths, page 95 (image 167 of 3991), William Whetny birth record; citing original data from Massachusetts town and city clerk records in Jay and Delene Holbrook, Massachusetts Vital and Town Records (Provo, Utah : Holbrook Research Institute), Microfiche collection,
William Whitney was the third child of Nathaniel Whitney (1647-1733) and Sarah Hagar (1651-1722). William Whitney married Martha Pierce (1681-1759) in Watertown in 1706. William and Martha (Pierce) Whitney are my 6th great-grandparents, through their son Samuel Whitney (1719-1782).