“ सर्वमङ्गलमाङ्गल्ये शिवे सर्वार्थसाधिके । शरण्ये त्र्यम्बके गौरि नारायणि नमोऽस्तु ते ॥

Avatars/ Roops of Brahma

Valmiki :is celebrated as the harbinger-poet in Sanskrit literature. He is the author of the epic Rāmāyaṇa, based on the attribution in the text of the epic itself. He is revered as the Ādi Kavi, which translates to First Poet, for he invented śloka (i.e. first verse or epic metre), which set the base and defined the form to Sanskrit poetry.

Kashyapa (Sanskrit कश्यप kaśyapa) was an ancient sage (rishi), who is one of the Saptarishis in the present Manvantara: others being Atri, Vashistha, Vishvamitra, Jamadagni, Bharadwaja, Gautama.
The seven great Rishis or saptarshis of the first manvantara are
Marichi, Atri, Angiras, Pulaha, Kratu, Pulastya, and Vashishtha. In
other manvantara there are other sapta-rshi. In the present manvantara the seven are Kashyapa, Atri, Vashishtha, Vishvamitra, Jamadagni, Bharadvaj. To the Rishi the Vedas were revealed. Vyasa taughtthe Rigveda so revealed to Paila, the Yajurveda to Vaishampayana, the Samaveda to Jaimini, Atharvaveda to Samantu, and Itihasa and Purana to Suta. The three chief classes of Rishi are the Brah-marshi, born of the
mind of Brahma, the Devarshi of lower rank, and Rajarshi or Kings who
became Rishis through their knowledge and austerities, such as Janaka, Ritaparna, etc. Thc Shrutarshi are makers of Shastras, as Sushruta. The Kandarshi are of the Karmakanda, such as Jaimini.

Shukra (शुक्र, ശുക്രൻ, ಶುಕ್ರ, சுக்ரன், IAST Śukra), the Sanskrit for "clear, pure" or "brightness, clearness", is the name of the son of Bhrigu, and preceptor of the Daityas, and the guru of the Asuras, identified with the planet Venus, one of the Navagrahas (with honorific, शुक्राचार्य Shukracharya). He presides over Shukravar (Devanagari: शुक्रवार) or Friday. He is of white complexion, middle-aged and of agreeable countenance.
He is described variously as mounted on a camel, horse or crocodile. He holds a stick, beads and a lotus and sometimes a bow and arrow.Ushanas is the name of a Vedic rishi with the patronymic Kāvya (descendant of Kavi, AVŚ 4.29.6), who was later identified as Ushanas Shukra.

Bṛhaspati (Sanskrit: बृहस्पति, "lord of prayer or devotion",[often written as Brihaspati or Bruhaspati) also known as Deva-guru (guru of the gods), is a Hindu god and a Vedic deity.
He is considered the personification of piety and religion, and the
chief 'offerer of prayers and sacrifices to the gods' (Sanskrit: Purohita), with whom he intercedes on behalf of humankind.
He is the guru of the Devas (gods) and the nemesis of Shukracharya, the guru of the Danavas (demons). He is also known as Ganapati (leader of the group [of planets]), and Guru (teacher), the god of wisdom and eloquence, to whom various works are ascribed, such as the Barhaspatya sutras.He is described as of yellow or golden color and holding the following divine attributes: a stick, a lotus and beads. He presides over 'Guru-var' or Thursday.

Vyasa: (Devanagari: व्यास, vyāsa) is a central and revered figure in most Hindu traditions. He is also sometimes called Veda Vyāsa (वेदव्यास, veda-vyāsa), (the one who classified the Vedas into four parts) or Krishna Dvaipāyana
(referring to his complexion and birthplace). There are two different
views regarding his birthplace. One of the views suggests that he was
born in the Tanahun district in western Nepal. He is the author of the Mahabharata, as well as a character in it. He is considered to be the scribe of both the Vedas and Puranas. According to Hindu beliefs, Vyasa is an incarnation of the god Vishnu. Vyāsa is also considered to be one of the seven Chiranjivins (long lived, or immortals), who are still in existence according to general Hindu belief.Vyasa lived around the 3rd millennium BCE.The festival of Guru Purnima is dedicated to him. It is also known as Vyasa Purnima, for it is the day believed to be both his birthday and the day he divided the Vedas.

Khat Rishi Avatar:-  it is 6th Avatar of Brahma.

Kalidasa ("servant of Kali" Sanskrit: कालिदास) was a Classical Sanskrit writer, widely regarded as the greatest poet and dramatist in the Sanskrit language. His floruit cannot be dated with precision, but most likely falls within the 5th century AD.
Sanskrit language is an OldIndo-Aryan language in which the most ancient documents are the Vedas, composed in Vedic Sanskrit. Many other important books written in Sanskrit are the Ramayana , the Mahabharata, etc. The most famous book written by an author is Ashtadhyayi, by PaniniMaharshi.His plays and poetry are primarily based on the Hindu Puranas and Hindu philosophy.
Notes: ब्रह्मा अवतार के बारे में ये जानकारी SikhiWiki.org  के द्वारा प्राप्त की गई है.
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