The question asks us to identify which among the given names were Cavalier Poets. Let's examine who the Cavalier Poets were and determine the correct options.

Cavalier Poets were a group of English poets from the 17th century who were loyal to King Charles I during the English Civil War. They are known for their carpe diem ("seize the day") themed poetry, which often expressed life's pleasures, beauty, and love.

Let's analyze each option:

1. Robert Herrick: He was indeed a Cavalier Poet. Herrick is well-known for his lyrical poetry and his collection "Hesperides," which includes many famous carpe diem poems. Thus, Robert Herrick is one of the correct answers.
2. George Herbert: While contemporary with the Cavalier Poets, Herbert was associated more with the Metaphysical Poets. His works often explore religious themes and are less aligned with the Cavalier style.
3. Richard Lovelace: Lovelace is another recognized Cavalier Poet. He is famous for poems such as "To Althea, from Prison" and "To Lucasta, Going to the Warres," which reflect Cavalier themes and style. Therefore, Richard Lovelace is also a correct answer.
4. Andrew Marvell: Although sometimes connected to the Cavalier Poets due to the era, Marvell's work aligns more with the Metaphysical Poets. He explored complex themes and wrote in a more intricate manner, differentiating him from the straightforward Cavalier style.

Combining our analysis, the correct options that are indeed Cavalier Poets are Robert Herrick and Richard Lovelace.