Guru Gobind had 2 wives, Mata Sahib Kaur, and Mata Jito
Guruprabs is the name of the festival which celebrate the birthdays of Sikh Gurus.
By tradition, ten. The first one was Guru Nanak. The tenth was considered to be the final one, and the "eleventh" is the Book .. "Guru Granth Sahib".
The 10 Gurus
Three.
Sikh is defined as "any human being who faithfully believes in One Immortal Being; ten Gurus, from Guru Nanak Sahib to Guru Gobind Singh Sahib; the Guru Granth Sahib; the utterances and teachings of the ten Gurus and the baptism bequeathed by the tenth Guru; and who does not owe allegiance to any other religion. They supposed to follow the Rayhet Maryada as instructed by the Gurus.
they celebrate the birthdays of the gurus
Sikh Gurus
Celebration of Sikh Gurus birthdays, Vaisakhi, Diwali, Hola Mola.
The Chicken
Sikh is defined as "any human being who faithfully believes in One Immortal Being; ten Gurus, from Guru Nanak Sahib to Guru Gobind Singh Sahib; the Guru Granth Sahib; the utterances and teachings of the ten Gurus and the baptism bequeathed by the tenth Guru; and who does not owe allegiance to any other religion
Dev is just a Sikh surname which some of the Gurus had.
Guru Angad