For this Duncan Leonard there are 3 different names on Yasni.
In the ranking of the most common first names Duncan Leonard is on position 4588.
Male first name (English): Duncan, brown (haired) warrior; Old Irish (Word format); donn = brown; chadh = the warriors
Male first name (English): Leonard, Old High (two-part name); lewo = the lion; harti = hard, strong, firm, resolute; old German two-part name; distributed by St.. Leonhard, a Frankish hermit (6th century)