Diago is a derivative of the Spanish and Italian Diego.
Diago is also a derivative (Portuguese) of the English and Hebrew James.
Diago is not often used as a baby boy name. It is not in the top 1000 names. In 2018, among the family of boy names directly related to Diago, James was the most popular.
† approx English pronunciation for Diago: D as in "day (D.EY)" ; AY as in "side (S.AY.D)" ; AA as in "odd (AA.D)" ; G as in "grin (G.R.IH.N)" ; OW as in "oak (OW.K)"