Romans 16:14

Salute Asyncritus, &c.--These have been thought to be the names of ten less notable Christians than those already named. But this will hardly be supposed if it be observed that they are divided into two pairs of five each, and that after the first of these pairs it is added, "and the brethren which are with them," while after the second pair we have the words, "and all the saints which are with them." This perhaps hardly means that each of the five in both pairs had "a church at his house," else probably this would have been more expressly said. But at least it would seem to indicate that they were each a center of some few Christians who met at his house--it may be for further instruction, for prayer, for missionary purposes, or for some other Christian objects. These little peeps into the rudimental forms which Christian fellowship first took in the great cities, though too indistinct for more than conjecture, are singularly interesting. Our apostle would seem to have been kept minutely informed as to the state of the church at Rome, both as to its membership and its varied activities, probably by Priscilla and Aquila.

— Jamieson-Fausset-Brown Commentary (public domain)