Bromma socken, Sollentuna Hundred

The name of the socken (in 1344 Brumum) derives from the name of the kyrkby, the village or hamlet adjacent to the church.

An alternative etymology proposes that the name is onomatopoetic, describing the murmuring "brumma" sound of a lake or harbour.

[2] Bromma socken was located west of Stockholm, with Lake Mälaren to the south, Ulvsundasjön to the east, and Bällstaviken with Bällstaån Stream to the northeast.

The terrain in the north of the socken was predominantly flat plains, with hilly woodland in the south.

[3] Bromma socken is first found in written records in 1314 (as De Brumum).