Rolls of Honour are a written form of war memorial that might take the form of a published book, handwritten manuscript or framed list of names.
Merchant Navy
The following two publications will prove particularly useful:
Cross of Sacrifice: volume V: the Officers, Men and Women of the Merchant Navy and Mercantile Fleet Auxiliary, 1914-1919 compiled by S D and D B Jarvis (Uckfield, East Sussex: Naval and Military Press, 2000)
Book of Remembrance: the Merchant Navy World War Two researched by Ian Stockbridge ([London]: NUMAST, [2003])