By default, newly created fingerprints on the LG device are numbered "Finger 1", "Finger 2" etc. For better order and identification, the fingerprints can also be renamed.

Android 9 | LG UX 9.0
Rename Fingerprint -  Open the  Settings
Rename Fingerprint -  Tap on  General
Rename Fingerprint -  Tap on  Lock screen & security
Rename Fingerprint -  Tap on  Fingerprints
Rename Fingerprint -  Enter  Password / PIN / Pattern
Rename Fingerprint -  Tap on desired  Fingerprint
Rename Fingerprint -  Enter  name  and tap on  Save
  1. Open the Settings
  2. Tap on General
  3. Tap on Lock screen & security
  4. Tap on Fingerprints
  5. Enter Password/PIN/Pattern
  6. Tap on desired Fingerprint
  7. Enter name and tap on Save

LG Instructions