Recording a legal name change

In my ancestry, there a case of a family who made a legal name change,
from <italian-name> to <new-WASPy-name> in 1943.
I found the official record in the NJ state records at
wwwnet-dos.state.nj.us/DOS_ArchivesDBPortal/NameChanges.aspx 

I had this individual under his <new-WASPy-name>. 
What is a good way to record the newly-discovered previous name ?
I didn't see a way to record this name change as an "event" for this person.

To me, the ideal would be to have the individual ending up recorded as 
<new-WASPy-name>  aka <italian-name> , with an event (or whatever)
explaining that there was this legal name change on <date>, state file 
reference "DCR File 12345".

What is the best way to record this in Gramps?


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