It's possible you're thinking of compound personal pronouns, which are formed by combining a personal pronoun with the word "self" or "selves".
Here are some examples:
* Myself
* Yourself
* Himself
* Herself
* Themselves
These pronouns are used for emphasis or to reflect back on the subject of a sentence. For example:
* "I did it myself."
* "They made the decision themselves."
Let me know if you have any other questions about pronouns! 😊