Help with burial record
UK, England, Lancashire—Nonconformist Church Records, 1647–1996 [Part B][MSLY-7QB]
In the second column under burials, April 1749: Third entry: B William Cowle
My question: Is the B part of his name or is it a title?
Also: under August burials: what is the relationship of Ann to William?
Thanks in advance for your time,