kuja dosha, kuja dosha nakshatras some information about 'Kuja Dosha' or 'Manglik' in a horoscope. Kuja, Angaraka and Mangala are a portion of the names for Mars and Mars impact being set in specific places of horoscope causes Kuja/Angaraka/Mangala Dosha.
https://www.eastrohelp.com/blog/remedy-the-malice-of-kuja-dosha-in-married-life/