This site introduces unknown Emanuel Bach (C. P. E. Bach).
ChatGPT4o writes as follows (please note that it may not be accurate):
Emanuel Bachʼs character piece "La Ernestine" (Wq. 117-38) is an elegant and sentimental work included in the 1765 collection of character pieces. Set in G minor, it expresses deep emotions through its gentle melody and subtle harmonies. The title suggests a personal dedication or a tribute to a close individual, well reflecting the characteristics of the Empfindsamer Stil (sensitive style). Despite its brevity, it contains delicate expressions, requiring performers to skillfully convey emotional nuances. It was cherished as salon music of the time, leaving a strong impression on audiences who loved emotionally rich music.