Ottoman dynasty was created in 1281.

OSMAN I, the namesake of the Ottoman Empire (Osmanlı İmparatorluğu in Turkish), founded the Ottoman Dynasty. The Ottoman Empire is one of the few multicentennial empires that had only one royal family/dynasty.

Yes, the Ottoman Dynasty was the Osman family. Founded by a relatively uninfluential chieftain who overthrew the Seljug Turk aristocracy and formed the Ottoman Empire. The Empire which eventually captured Constaninople in 1453 and changed the name to Istanbul.

this dynasty in Iran had conflict from one hand with Ottoman and in other hand with internal struggles..but the original conflict was with Ottoman,

The first WW1 ended the following Dynasties: Germany - Hohenzollern Dynasty Russia - Romanov Dynasty Austria-Hungary - Habsburg Dynasty Turkey - Ottoman Dynasty