273	OATES	St. Keverne	All
	706	OAT(E)S	St. Just in Penwith	1600+
	706	OAT(E)S	Sennen	1600+
	445	ODGERS	Ruan Lanihorne	All
	367	OLIVE	Illogan	18C
	303	OLIVER	St. Columb Major	1700-1800
	453	OLIVER	Gorran	Any
	677	OLIVER	St. Columb Major	1740-1780
	626	OPEY (John)	Stithians	c1690
	666	OPPY	Stithians	18-19C
	357	OUGH	St. Germans / Landrake	1725-1850
	715	OSBORNE	Redruth	1700+
	453	OSMOND	Millbrook	Any
	706	OTES	St. Just in Penwith	1600+
	706	OTES	Sennen	1600+