Here is a list of prominent cricketers who passed away in 2018. Apart from male Test players who are covered in full, other categories covered here would be female international players, ODI and T20I players, Test umpires, administrators and major domestic players. The last two categories are subjective, depending largely on whether the compiler has heard of them earlier.
This is delayed until the end of September 2019 as some deaths are reported late-sometimes even years later for lesser-known players.
Information is summarized from the obituaries in Cricinfo and Cricketarchive.
Here is a note about Bevan Congdon: https://abn397.wordpress.com/2018/02/13/bevan-congdon-r-i-p-and-his-indian-connection/