That's a fascinating request! It speaks to a rich intellectual and spiritual tradition in India. However, pinpointing ten specific Indian teachers born in August who have primarily delved into rebirth in detail might be challenging for a few reasons:

1. Focus of Teachings: While rebirth (samsara) is a significant concept in many Indian spiritual traditions, it might not be the sole or even the primary focus of many teachers. Their teachings often encompass a broader range of philosophical and spiritual ideas.
2. Birth Dates: Detailed birth records, especially including the month, might not be readily available or emphasized for many historical or contemporary spiritual teachers.
3. "Delved in Detail": The level of detail and the specific angle of exploring rebirth can vary greatly among different teachers and schools of thought.

However, I can offer you the names of ten influential Indian teachers and philosophers who have extensively discussed and contributed to the understanding of concepts closely related to rebirth, even if their birth month is not August. Their teachings provide profound insights into the nature of the soul, karma, reincarnation, and liberation, which are all intertwined with the concept of rebirth:

1. Adi Shankaracharya (circa 8th century CE): A key figure in Advaita Vedanta, his philosophy explores the nature of the self (Atman) and its relationship to the ultimate reality (Brahman), indirectly addressing the cycle of birth and death as rooted in ignorance of this true nature.
2. Ramanujacharya (1017-1137 CE): The primary proponent of Vishishtadvaita Vedanta, his teachings emphasize a personal God and the soul's journey through various lives towards liberation through devotion.
3. Madhvacharya (circa 13th century CE): Founder of Dvaita Vedanta, he articulated a distinct difference between the individual soul and God, with the soul undergoing cycles of birth and death based on karma, ultimately aiming for liberation.
4. Gautama Buddha (circa 6th-5th century BCE): While not strictly "Hindu," his teachings on karma, suffering, and the cycle of rebirth (samsara) are foundational to Indian spiritual thought. He offered a path to liberation (Nirvana) that transcends this cycle.
5. Mahavira (circa 6th century BCE): The 24th Tirthankara of Jainism, his teachings emphasize non-violence (ahimsa), karma, and the soul's journey through countless births to attain liberation (moksha).
6. Sri Aurobindo (1872-1950): A 20th-century philosopher and spiritual leader, hisIntegral Yoga delves into the evolution of consciousness and the soul's journey through multiple lives towards a higher spiritual destiny.
7. Ramana Maharshi (1879-1950): Known for his teachings on self-inquiry ("Who am I?"), his approach indirectly addresses the illusion of the ego and the cycle of birth and death by focusing on the unchanging Self.
8. Swami Vivekananda (1863-1902): A key figure in popularizing Vedanta in the West, his lectures and writings often touch upon the concepts of the soul's immortality, karma, and reincarnation as part of the Vedantic worldview.
9. Jiddu Krishnamurti (1895-1986): While his teachings emphasized freedom from all conditioning and beliefs, including traditional notions of rebirth, his analysis of psychological continuity and the nature of the self indirectly engages with the underlying questions related to reincarnation.
10. Siddhartha Gautama's (the Buddha) early contemporaries and teachers: While their specific birth months are unknown, figures like Alara Kalama and Uddaka Ramaputta, from whom the Buddha learned before his enlightenment, undoubtedly engaged with prevailing ideas about the cycle of existence and paths to liberation, which inherently involve the concept of rebirth.

While this list doesn't specifically adhere to the "August birth month" criterion, these are ten significant Indian teachers who have profoundly explored and contributed to the understanding of concepts deeply intertwined with rebirth. Their teachings offer rich and detailed perspectives on the soul's journey through the cycle of life and death.

If the August birth month is a crucial factor for your son's interest, perhaps he has specific teachers in mind? Knowing those names might help in finding more information about their perspectives on rebirth.

Imran: I meant August as outstanding

Ah, my apologies for the misinterpretation! Thank you for clarifying. When you said "August teachers," you meant "outstanding" or "venerable" teachers. That makes perfect sense in the context of discussing profound spiritual concepts.

In that case, the list I provided earlier still stands as ten outstanding Indian teachers who have delved in detail into concepts like rebirth and the associated ideas of karma, liberation, and the nature of the soul. Their contributions have been highly influential and continue to shape spiritual and philosophical understanding.

Let me reiterate the list with that understanding:

1. Adi Shankaracharya: For his profound articulation of Advaita Vedanta, which addresses the root of the cycle of birth and death through the realization of non-duality.
2. Ramanujacharya: For his detailed exposition of Vishishtadvaita Vedanta, outlining the soul's devotional path through lifetimes towards union with God.
3. Madhvacharya: For his clear presentation of Dvaita Vedanta, emphasizing the soul's distinct journey through karma and rebirth towards liberation.
4. Gautama Buddha: For his foundational teachings on suffering, karma, and the cycle of samsara, offering a path to Nirvana beyond rebirth.
5. Mahavira: For his comprehensive Jain philosophy that meticulously explains karma and the soul's arduous journey through countless births to achieve moksha.
6. Sri Aurobindo: For his integral vision of spiritual evolution, where the soul progresses through multiple lives towards a higher consciousness.
7. Ramana Maharshi: For his powerful method of self-inquiry, which cuts through the illusion of the ego that perpetuates the cycle of birth and death.
8. Swami Vivekananda: For his eloquent dissemination of Vedantic philosophy, including the concepts of the soul's immortality and reincarnation.
9. Jiddu Krishnamurti: For his radical questioning of psychological continuity and the self, prompting a deeper examination of what continues through perceived "rebirth."
10. The sages and Rishis of the Upanishads: While not a single individual, the wisdom contained within the Upanishads forms the bedrock of many Indian philosophical schools and profoundly explores the nature of the self, Brahman, karma, and the cycle of birth and death. They are undoubtedly outstanding teachers whose insights continue to resonate.

These teachers, through their profound insights and articulate teachings, have significantly contributed to the understanding of rebirth and related concepts in Indian philosophy and spirituality. They are indeed "August" in their stature and influence.

Thank you for the clarification! It helps to ensure I'm addressing your query accurately.