Dal Maso is a proper surname and today it's quite widespread in that area.
You might find something here even if there are very few years:
http://dl.antenati.san.beniculturali.it ... ?g2_page=2

Hi,
Giovanni De Bortoli's parents were Giovanni Battista (son of Giovanni) and Maria Domenica Boschet.
Giovanni De Bortoli and Margherita Fiorese married in Pedavena on the 5th of May 1907. She was born in Cismon del Grappa on the 28th of July 1880 from Giacomo Fiorese and Maria Rizzon

If he was born in 1869 it's very unlikely that he participated in any war. My guess it's that he was awarded a decoration for his work.

Hello,
it seems more a civil decoration, but it's very hard to say in this photo. Which was his job? When was he born?

Not that I know of unfortunately. There are a few municipal archives where you can have access to late '800/early '900 census forms but it's just a minority

It's likely that his paternal grandfather would be named Federico, but it's definitely not an universally applied rule. It could be anything.

Hi Ben,
I suspect that "Lifore" is in fact Lison an hamlet in the municipality of Portogruaro which has been an autonomous parish since the 16th century. The long s is often confused with an "f".
If the act you're searching is post-1871 you can probably find it here:
https://www.familysearch.org ...

You mean Loppia in the comune of Bellagio? In that case maybe the other place would be "Borgo" instead of "Barga"?

Was Rosina daughter of Angelo Santarossa and Maria Angela Marcuzzi? Unfortunately you won't find her marriage online (only up to 1910 on FamilySearch). However if you know where their children were born you can request from the municipality a "certificato di stato di famiglia storico" where all the ...

Giovanna Cestari was the daughter of Giuseppe and of Fortunata Marin, "esposta del Civico Spedale di Mirandola" (Fortunata was brought as a newborn to the hospital in Mirandola and her parents are probably unknown). The other names are: Mauroner Carlo of Antonio and Stefanini Aristide of the late ...

This is the first marriage of Giovanni Vincenzi in Roncoferraro with Giovanna Cestari
http://dl.antenati.san.beniculturali.it ... 6.jpg.html

Have you looked for the birth acts of Orlando's children?

In order to find the right collection on FS you have to search using the name of the province, not the municipality

This might be her father?
http://www.lacasadellamusica.it/Vetro/Pages/Dizionario.aspx?ini=M&tipologia=1&idoggetto=2607&idcontenuto=1792

You can request a copy of Ada's birth act writing to this e-mail (preferably in Italian), together with a copy of your document:
DSC.ServCittadini@comune.milano.it

This is the 1879 marriage between Giovanni Borghesan and Marianna Lorenzetto:
https://www.familysearch.org/ark:/61903/3:1:939K-RZ7B-C?i=14&wc=MDF7-T29%3A244882701%2C245306001&cc=1946877

Here you can request an "estratto di atto di matrimonio" which is a certified extract of the original act
http ...