William's parentage is uncertain, Kerry Boren writes in his book that he is the son of Richard [Boren-315]. However possible that might be, there are no known sources at this time (April 2019), that prove it. The two men could have been related to each other in some other way, such as brothers or cousins. If William had any children other than William II, they are unknown.
It is also unknown if he was a sibling or any relation to James [Bowren-38], or John [Boring-191].
Cavaliers and Pioneers Patent Book No: 5; p. 562. (Virginia?)
William receives a land patent in 1666 for 1,000 acres of land in Stafford Co., Virginia. This is the same land (plus 350 acres more or less) that Richard [Boren-315], patented in 1654. Because of Richard's death William had to obtain a new patent on the land or loose it because he no longer lived there.
Northern Neck Patents 5: p. 644. (Virginia?)
William sells the Virginia land in 1668 and returns to "Boren's Forest", Maryland. That is the other land that Richard Boren had patented later on in Cecil Co., Maryland.
Boren, Kerry Ross & Lisa Lee. The Boren Family: An Irish Legacy. K & L Boren Partnership. Salt Lake City, Utah: 2010. pp. 38, 47-52.