Ladislaus Sunthaym: Der löblichen Fürsten und des Landes Österreich Altherkommen und Regierung
Genealogical tree of the Babenbergs:
A - Leopold I, Margrave of Austria, founder of the dynasty
B - Henry I, Margrave of Austria, son of Leopold I
C - Poppo, Archbishop of Trier, son of Leopold I
D - Adalbert I, Margrave of Austria, son of Leopold I
E - Ernest I, Duke of Swabia, son of Leopold I
F - Leopold, Margrave of the Hungarian March, son of Adalbert I
G - Ernest, Margrave of Austria, son of Adalbert I
H - Ernest II, Duke of Swabia, son of Ernest I of Swabia
I - Herman IV, Duke of Swabia, son of Ernest I of Swabia
(J doesn't exist, is pronounced as letter I)
K - Leopold II, Margrave of Austria, son of Ernest I of Austria
L - Adalbert I, Duke of Bogen, son of Ernest I of Austria
M - Leopold III, Margrave of Austria, son of Leopold II
N - Poppo, Archbishop of Trier (again?)
O - Adalbert (II) of Austria the Devout, son of Leopold III
P - Henry II, Duke of Austria, son of Leopold III
Q - Leopold IV, Margrave of Austria, son of Leopold III
R - Ernest of Austria der Jungling
S - Otto of Freising, son of Leopold III
T - Conrad of Babenberg
U (or V) - First unknown son of Leopold III of Austria
(V doesn't exist, is pronounced as letter U)
W - Second unknown son of Leopold III of Austria
X - Leopold V, Duke of Austria, son of Henry II
Y - Henry I, Duke of Mödling, son of Henry II
Z - Frederick I, Duke of Austria, son of Leopold V
a - Leopold VI, Duke of Austria, son of Leopold V
b - Henry II, Duke of Mödling, son of Leopold VI
c - Leopold of Babenberg, the Good son of Leopold VI
d - Henry III, Duke of Mödling, son of Henry I of Mödling
e - Frederick II, Duke of Austria