Tropico 5
70 Achievements
GOG
Heir And Now
Recognize a new heir
83.3%
How to unlock the Heir And Now achievement in Tropico 5 - Definitive Guide
Robinworldwide
This event is random but will surely happen during your campaign run or if you play a sandbox game long enough. You will get a notification of a surprise pregnancy within your dynasty and your advisor will ask you how to handle this. Choose to either organize a wedding and build a Catholic Mission or choose "I like a good scandal", then appoint a job for your heir and the trophy will pop.
Mahtan, Tinuvil
Refer to Presidente's Seven (30G)
Gleylancer
When there's an event of surprise-pregnancy, just organize a quick wedding. After 9 months, you can name and equip your new heir and the achievement will unlock. There's also other events when you can accept people as heir.