Link to digitized Theology periodicals: https://de.wikisource.org/wiki/Zeitschriften_(Theologie)#S
Studien und Mitteilungen aus dem Benediktiner- und dem Cistercienser-Orden: mit besonderer Berücksichtigung der Ordensgeschichte und Statistik. In this publication under the topic "Nekrologische Notizen" or "Sterbeanzeigen und Nekrologe" deaths of individuals in these orders are listed. Americans are included. Do not rely on the "Search" feature to find an individual. An example from 1918 is below:
5 Gerardus Osztovics, born on September 13, 1852 in Sirokäny, Vas County, in a tiny hamlet, was ordained on September 8, 1872, took simple vows on July 24, 1875, solemn vows on September 8, 1878 and was ordained a priest on July 7, 1879. 1879-80 he was a catechist in Györszentmärton, 1880-93 grammar school professor in Györ (history and geography), 1893-1901 also cellarer there, 1901-04 only professor, 1904-08 supervisor of the wine culture and cellar in Pannonhalma, 1908-16 professor in Köszeg, since 1916 retired in Tihany. Because of stomach cancer he underwent an operation in a sanatorium in Budapest in the summer of 1917, but it did not help, so that he passed into a better afterlife on September 9. As long as he was healthy, he was always in a good mood, liked to joke around and was very popular with his confreres because of his modesty, conscientiousness, unpretentiousness and sociability and was only called “Uncle Daniel” by the younger generation after his baptismal name.
Another one:
On May 1, after a long and severe suffering in St. Ottilien, our dear choir superior Fr. Leander Schirlinger went to his eternal home. He was born in Munich on October 9, 1892, entered the novitiate at St. Ottilien on September 1, 1914 after completing his high school studies in our institutions, but had to exchange his habit for the uniform of the infantry regiment on December 1 of the same year and went into the field at the end of February 1915. There he contracted a serious lung disease and returned to St. Ottilien after lengthy treatment in foreign military hospitals. On the feast of St. Maurus in 1917, after completing the canonical novitiate in the infirmary, the terminally ill man took his holy vows. Death put an end to this short but certainly meritorious religious life on May 1st
See Band 35 (1914) pages 1-45 "Verzeichnis der deutschen Benediktinerinnenklöster" by M. Regintrudis v. Reichlin-Meldegg and Dr. Franz J Brendel. at this link: https://archive.org/details/studienundmitteilungenzurgeschichtedesbenediktinerordensundseinerzweigebd351914/page/n7/mode/2up?view=theater