Julius Röntgen was born on 9 May 1855 in Leipzig, the son of Dutch violinist Engelbert Röntgen, leader of the Gewandhausorchester there, and German pianist Pauline Klengel. He started composing at an early age and took the stage with his own works in Hamburg, Dusseldorf and Leipzig as a child prodigy. At the age of fifteen he was introduced to Franz Liszt, who invited him to one of his famous soirees after he played two of his own compositions to him.

The Matangi Quartet's 2005 release Scandinavia has one slight problem: while two of the composers, Edvard Grieg and David Monrad Johansen, were Norwegian, the third, Julius Röntgen, was Dutch! His presence is explained by his close friendship with Grieg, and the Matangi Quartet's decision to include his attractive two-movement Quartettino in A minor as filler is barely justifiable through that connection. Grieg's String Quartet in G minor, Op. 27, and Johansen's String Quartet, Op. 35, both deserve their place here, not only due to their creators' nationality but because they are solid examples of quartet writing outside the German tradition, and demonstrate the Norwegian proclivity to incorporate folk-inspired melodies in looser, more sectionalized developments than are found in Classical, motivically integrated models.