Berta Bolyai

From Hungarian Wikipedia

Bolyai Farkas

1854-ben két nagy bánattal kellett megküzdenie: meghalt kis unokája (Berta) és öreg barátja, Gauss.

In 1854, two great sorrow had to contend with: died his granddaughter (Berta), and Gauss, his old friend.

Note from FAEKAS Mihály László: His first son János had two children, Dénes Bolyai and Amália Bolyai. This Berta's father only Gergely could (half brother of János).