Who is the very most world famous poetess?

It's impossible to definitively say who is the most famous poetess in the world, as fame is subjective and varies across cultures and time periods. However, some of the most well-known and influential poetesses throughout history include:

* Sappho: A Greek poet from the 7th century BCE, known for her passionate love poems. Her work is considered groundbreaking in its exploration of female desire and sexuality.

* Emily Dickinson: An American poet from the 19th century, known for her unique style and her exploration of themes like death, love, and spirituality.

* Maya Angelou: An American poet and activist known for her powerful and moving poetry that addresses themes of racism, identity, and resilience.

* Sylvia Plath: An American poet known for her confessional style and her exploration of mental health and personal struggle.

* Adrienne Rich: An American poet and feminist known for her work that challenged traditional gender roles and explored themes of sexuality, power, and social justice.

* Rupi Kaur: A contemporary Canadian poet known for her short, accessible poems that explore themes of love, loss, and self-discovery.

Ultimately, the answer to this question is subjective. Which poetess is most famous depends on your personal preferences and the specific cultural context you are considering.