Name of group: Raafidhah
Adherent to group: Raafidhee, plural – Rawaafidh
They are more commonly known as the Shee’ah who have exceeded in their love and honour for the Aal al-Bayt (the family of the Prophet ﷺ).
They are called the Raafidhah because they rejected the leadership of Zayd ibn ‘Alee ibn al-Husayn, and also when they asked him about Abu Bakar and ‘Umar and he praised them. So they said: “They are the ministers of my grandfather”, then they departed and as a result rejected (the statement and leadership of Zayd ibn ‘Alee).
Further reading
ash-Shee’ah was-Sunnah – Ihsaan Elahe Zaheer;
al-Khutoot al-‘Areedhah – Muhibbudeen al-Khateeb, foreward by Ihsaan Elahe Zaheer.