There is also the Romanian version VLASIE or VLASE or VLAS or VLASIU.
― Anonymous User 6/21/2020
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The actual modern Greek form of Blasius (see Blaise) is Vlasios (Βλάσιος). Vlassis is a variant form of Vlasis, which itself is a diminutive of Vlasios.Further, I would like to note that Vlasios can also come from an authentic Greek name. For that, I refer to my entries for Vlasios and Blasios in the Submitted Names Database. :) Also check out this post of Pavlos at the Names Facts message board:Http://www.behindthename.com/bb/fact/16482Plus take a look at this section of Pavlos' website:Http://web.archive.org/web/20120324121302/http://www.etymologica.com/page3.htm.