it's not the number who give the info - they could all be based on the same (?erroneous source - I queried it as there appears to be two children to Dollin bapt on same day (and the only children to a dollin in this period in jurby in any extracted record) - twins are generally indicated as such in the register (and also have the dubious distinction of considerably higher infant mortality) - however tho it is quite possible, you need to link dollin to wm by for example a will, marriage contract or land transfer as the burial reg has no additional info (neither does the will tho that does bear out a death of wm in his prime with children of barely legal age - and possibly debt ridden with possibly no immediate family members) - I presume you have checked with the parish reg film - I havn't looked at this part of the original register but if Jurby is anything like Michael + Ballaugh the IGI will be full of junk patron submitted records - I did note that the surviving register appeared to be a copy made c. 1692, missing some pages and had many duplicate entries