What you have here is a THEME containing several otherwise unrelated songs. Some of them may have inspired others but they have different choruses and different tunes and are only related by theme. You can call them variants of the THEME but they are separate songs and to call them versions of the same song is to cause confusion. There are numerous songs throughout history that use this theme and indeed this pattern. The 2 main types are those that are describing cheating trades and those listing various tradesmen come to court a girl. The word 'next' is of course used rather a lot. They are officially 'catalogue' songs.