Hugo was born on 3 February 1841 in Monschau and married to Hulda Caecilia Kelsch on 4 October 1866 in Aachen.
A Hugo Bellesheim, aged 27 years, arrived at the Port of New York on 30 August 1867 having departed from Hamburg, Germany on the ship Germanic.
After his ordination of priest s in the year 1862 he was assumed as chaplain at the Santa Maria dell'Anima, where he was active 1862 and where he obtained his doctorate in the last month of his time in Rome.
Subsequently, in the following more than 25 years he was active in the scientific-theological research and published a lot of publications, including 10 books, 4 brochures, 148 essays and 77 inscriptions in dictionaries.
Finally in 1902 Bellesheim was appointed as provost at the Aachen Cathedral and he practised this ministry until his death in 1912 and was in the meantime honoured with the title as a Protonotary apostolic.