100+ mentions are found for request
different sources from the year —1902 (15) 1906 (2) 1917 (41) 1932 (1) 1938 (42) 1942 (26) 1943—2007 (5)

Hugo Tkalčić

Source: 'List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia , year 1917.

Hugo Kathrein

Source: 'List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia , year 1917.

Hugo Heinrich

Source: 'List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia , year 1917.

Hugo Weisfeld

Source: 'List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia , year 1917.

Hugo Feth

Source: 'List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia , year 1917.

Hugo Sigović

Source: 'List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia , year 1917.

Hugo Eisenstein

Source: 'List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia , year 1917.

Hugo Kon

Source: 'List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia , year 1917.

Artur-Hugo Spree

Source: 'Emigration Commission Zagreb , year 1932.

Hugo Weiss

Source: 'Phone Book - Zagreb 1938 , year 1938.