The earliest documented mention of BOLLEYTHOU [Bolitho] in Crowan is a Release [in the British Library]dated 1299[27 Edward] between the guardian of the heirs of Richard of Heligaon and Walter son of Hugh Le Gros & Jane his wife. [This information courtesy of Paul BOLITHO of Warwick from research by his late fatherRev BOLITHO]. It is probable that all West and South Cornish BOLITHOs take their name in the late 16th century from this group of farms. - East Cornish BOLITHOs might be from Bolitho (or Belitha) in Menheniot close to Liskeard. A possible meaning is "the wet house" which is consistent with the location of Bolitho on the slopes of Crowan Beacon. Another explanation is "big belly" (from the rounded slopes of Crowan beacon) - but I think the former is more likely. The earliest people named BOLITHOE ( and similar spellings) were in the late 16th century after parish clergy were supposed to record births, marriages and deaths - it took another 100 years before they generally did so.