Zulian is absolutely typical of Veneto, Zuliani is specific to Veneto and Friuli with a strain also in the province of Latina, Zuliano, almost unique in the Udine area, Zullian, absolutely rare, is due to errors in transcription of the surname Zulian, Zulliani, practically unique, is due to errors of transcription of the surname Zuliani, they should derive in some cases from the ethnic of the Julian Alps (Latin Juliae Alpes), but much more probably they derive from the medieval name Zulianus, an archaic form for Giuliano, of which we have an example in an Investiture Act written in Brescia in 1195: "... In ecclesia Sanctorum Martyrum Cosme et Damiani de civitate Brixie. In presentia Zuliani Scorezarii, Gaimarini filii quondam Richelboni de Porta, Ottonis filii Boccavellie atque Iohannis Agnetis de Salodo ...".
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