For this Rudy-Jan there are 2 different names on Yasni.
In the ranking of the most common first names Rudy-Jan is on position 4589.
Male first name (English): Rudy, Old High (two-part name); hruod = fame; wolf = wolf; old German two-part name, popular in medieval prince name, such as Rudolf von Habsburg (13th century)
Male first name (German, Scandinavian, Dutch, Polish, Czech): Jan, Yahweh is gracious, the Lord is good; Hebrew (New Testament): Yahweh = (Name of God); Chanan = favor, be gracious, name of St. John the Evangelist , also known by John the Baptist, at the end of the Middle Ages, the most common Christian name in Germany, so far contributed 23 popes named John