Esin
Esin is used by Muslim families, especially Turkish-speaking ones. It is not a Quranic proper name but its meaning ('inspiration') is positive and acceptable in Islamic naming conventions.
Esin originates in modern Turkish vocabulary meaning 'inspiration' or 'sudden idea' and is attested in 20th-century Turkish usage and civil records.
Common pronunciation is EH-sin (/'ɛsɪn/).
Yes—the Arabic-equivalent concept is 'Ilham' (إلهام), meaning revelation or inspiration.
No, Esin remains relatively uncommon outside Turkish-speaking communities and is considered rare internationally.