Most probably miswriting Roberto which should be Lamberto as appear on other children birth act
https://antenati.cultura.gov.it/ark:/12657/an_ua36224846/wXDVD4Z
https://antenati.cultura.gov.it/ark:/12657/an_ua36228309/w1Mzako
https://antenati.cultura.gov.it/ark:/12657/an_ua36203698/LpO1A8J
https://antenati.cultura.gov.it/ark:/12657/an_ua36203698/0A8p4Eg
Firenze City Hall’s Civil Vital Registration Records Office
https://www.antenati.san.beniculturali.it/
http://archivio.operaduomo.fi.it/battesimi/