Nodyn:Arweinwyr y Blaid Geidwadol (DU)

gw • sg • go Arweinwyr y Blaid Geidwadol

Yn Nhŷ'r Arglwyddi (cyn 1922)	Arthur Wellesley Edward Smith-Stanley James Harris Hugh Cairns Charles Gordon-Lennox Benjamin Disraeli Robert Gascoyne-Cecil Spencer Cavendish Henry Petty-FitzMaurice George Curzon

Yn Nhŷ'r Cyffredin (cyn 1922')	Robert Peel Yr Arglwydd George Bentinck Charles Manners Benjamin Disraeli gyda Charles Manners a John Charles Herries Benjamin Disraeli Stafford Northcote Michael Hicks Beach Yr Arglwydd Randolph Churchill William Henry Smith Arthur Balfour Andrew Bonar Law Austen Chamberlain

Arweinwyr (ers 1922)	Andrew Bonar Law Stanley Baldwin Neville Chamberlain Winston Churchill Anthony Eden Harold Macmillan Alec Douglas-Home Edward Heath Margaret Thatcher John Major William Hague Iain Duncan Smith Michael Howard David Cameron Theresa May Boris Johnson

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