What is common to these persons: Tevfic Esenç, Red Thundercloud, Laura Somersal, Ned Maddrell and Dolly Pentreath?

They are the last speakers of a language. When these persons passed away, also a language ceased to exists in our world.

• Tevfic Esenç was the last speaker of Ubykh.
• Red Thundercloud was the last speaker of Catawba Sioux
• Laura Somersal was the last speaker of Wappo
• Ned Maddrell was the last speaker of Manx
• Dolly Pentreath was the last speaker of Cornish