Sir Hugh John Ellis-Nanney, 1st Baronet, DL, JP (16 February 1845 – 7 June 1920) was a Welsh landowner, magistrate and British politician. During his lifetime, Ellis-Nanney gained wealth and stature residing in north Wales, UK. He was made Baronet of Gwynfryn and Cefndeuddwr in the year 1898. Ellis-Nanney was a landowner and had accumulated land and wealth through inheritance. The baronet invested in property which enabled him to build a new mansion called Gwynfryn, near Llanystumdwy. Ellis-Nanney was made a sheriff and had also become a justice of the peace in Caernarvonshire. Prior to becoming a baronet he stood in local elections.