Hughes John 1615 1686 : Allwydd neu agoriad paradwys i'r Cymrv : Hynny yw: gweddiau, devotionau, cynghorion, ac athrawiaethau tra duwiol ac angentheidiol i bôb Christion yn mynhu agoryd y Porth a myned i mewn i'r Nef. Wedi eu cynnull o amryw lyfrau duwiol, a'i cyfeithu yn Gymraeg: neu wedi eu cyfansoddi, gan I.H.
Hughes John 1797 1864 : A lecture on the importance of a Christian basis for the science of political economy, and its application to the affairs of life: delivered before the Calvert Institute, Baltimore, and the Carroll Institute, Philadelphia, on the 17th and 18th January, 1844 / by Rt. Rev. Dr. Hughes.
Hughes John 1958 : Programming language concepts and paradigms / D.A. Watt; with contributions by W.Findlay, J. Hughes.
1990
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Hughes John A : The light of Christ in a pagan world.
1940
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Hughes John Active 1622 : St. Pauls exercise, or, A sermon of conscience : Describing the nature of it; and declaring the manner and meanes how to obtaine, and retaine, a good conscience. Preached by Iohn Hughes, Doctor in Diuinitie.