They had at least four children. William married an "Artemisia" later. See the Yearwood site at www.my-ged.com for more info on this family. Her sponsors were Johannes Velte and Jane Bodyn. They had one daughter, Jane Buchanan.
From Ronny Bodine:
Susanna, daughter of William Bodyn and Maria Melsbach, was bapt. 2 May 1761 at the Montgomery DRC, Orange County. Her sponsors were Johannes Velte and Jane Bodyn, his wife. In his will, her father wrote "I give to my daughter Susana Beuchanan the sum of 15 pounds..."
From Brick Reformed Church of Montgomery, Orange County, Baptisms, 1734-1856:
Jean bapt. 25 July 1784 to William Buchanan & Susanna Bodine.
Mary, born 6 April, bapt. 16 Sept 1787 to William Buchanan & Susanna Bodine.
James, born 1 June 1790 to William Buchanan & Susanna Bodyn.
William, born 18 April 1792 to William Bodine & Susannah Bodyn.