Euphemia Chalmers Millais, Lady Millais ne Gray, known as Effie Gray, Effie Ruskin or Effie Millais was the wife of the critic John Ruskin, but she left her husband without the marriage being consummated. She later married his protg, the PreRaphaelite painter John Everett Millais. This famous Victorian love triangle has been dramatised in plays, films and an opera.
Effie Gray, initially known by the pet name of Phemy, was born in Perth, Scotland, and lived in Bowerswell, the house where Ruskins grandfather had committed suicide. Her family knew Ruskins father, who encouraged a match between them. Ruskin wrote the fantasy novel The King of the Golden River for her in 1841, when she was twelve years old. After their marriage in 1848, they travelled to Venice, where Ruskin was researching his book The Stones of Venice.
Source: Wikipedia