Amenhotep IV changed his name to Akhenaten. This change in name was significant as it reflected a change in his religious beliefs and practices.

Religious Reforms
- Amenhotep IV was originally a follower of the traditional Egyptian religion which focused on the worship of many gods, especially Amun.
- However, he introduced significant religious reforms which emphasized the worship of a single god called Aten.
- This was a radical departure from traditional Egyptian religion and caused significant controversy and opposition.

Name Change
- As part of his religious reforms, Amenhotep IV changed his name to Akhenaten which means "Effective for Aten".
- This change of name reflected his new religious beliefs and his focus on the worship of Aten.
- The name change was also significant as it marked a break from the traditional practice of naming pharaohs after their ancestors or gods.

Impact
- Akhenaten's religious reforms were short-lived and were largely abandoned after his death.
- However, his name change and his emphasis on the worship of a single god had a significant impact on Egyptian religion and culture.
- It influenced later religious movements such as monotheism and had a lasting impact on art and architecture.