Sir William Frederick Victor Mordaunt Milner, Eighth Baronet of Nun Appleton Hall in North Yorkshire, England, was active as a designer in the early-20th century.
From 1927 Milner laid out the gardens at Parcevall Hall in North Yorkshire, which he owned, and from 1931, he worked as the professional partner of Romilly Bernard Craze (born 1892, died 1974) in the architectural firm of Milner & Craze.