isonymy
/aɪˈsɒnɪmi/Definitions
1. noun
The condition of having two or more names, especially in cases where the same person is known by different names.
“The study of isonomyy has shed light on the complexities of identity and naming conventions in different cultures.”
2. noun
A term or name used as an alternative to another.
“Some researchers argue that ‘isonymy’ is an isonymy for ‘heteronymy’.”