Ena Gatenby (who is building the National Collection of Leucojum) tells me "I have also seen it referred to as Devon Snowflake, St Agnew flower and St George's Violet".
Patrick Roper points out: "On the topic of names, I suspect 'Loddon lily' is an old name that was current before Linnaeus called the plant 'Leucojum aestivum' in 1759. Subsequently Linnaeus's Latin was translated as 'summer snowflake' or its equivalent in English and other languages. He used the word 'aestivum' (summer) because that is when it flowered in central Sweden where he lived."