In a statement Adnan and Arsalaan Habib's family described the brothers as their "family's precious jewels, spreading joy wherever they went".
The statement added: "They were happy and joyous boys who were a central part of the family, always smiling and bringing smiles to everyone they met."
More top news
Do be aware that a widespread frost on Sunday night could linger until Monday lunchtime, as well as icy stretches in places
Frosty overnight with occasional snow showers continuing into Monday. Widespread frost could linger until Monday lunchtime
A sound engineer and friend of the Warrington band Viola Beach has paid tribute to them. The band died following a car crash in Sweden.