Family name シダル (Siddal 
, シダル) , globally, is a very rare cognomen. The family name シダル is habitual in the United Kingdom, where it is a very rare surname, Canada, and the United States, where it is an extremely rare surname. Not in comparison with a country's population, the name is most common in India, the United States, and the United Kingdom. Much less frequently, シダル is the forename as well as the last name.