Siôn Bradford (1706–1785) was a Welsh language poet, from Betws, Tir Iarll, Glamorgan, in south Wales.

Although a minor poet himself he is important as the poetic teacher of Edward Williams (Iolo Morganwg), and collaborated with him in his sometimes extravagant antiquarian researches.

References

• Lewis, C. W. "Bradford, John". Oxford Dictionary of National Biography (online ed.). Oxford University Press. doi:10.1093/ref:odnb/3176. (Subscription or UK public library membership required.). The first edition of this text is available at Wikisource: "Bradford, John (d.1780)" . Dictionary of National Biography. London: Smith, Elder & Co. 1885–1900.