Yeoman is the first out of 13 titles in the game. It gives you an advantage before a Commoner.
From the moment you are given the title, the amount of XP and EGO earned in the game is multiplied by a factor of 1.05. In other words, you start earning XP and EGO 5% faster.
Your Daily Tribute and Faction Tribute become 1.05 times as much.
There is no other way to become a Yeoman but to accumulate a stake of 500,000 EGO.
You can lose your title if your stake in EGO drops below 500,000.
You will be informed if any of the risk factors occurs. You will have at least 48 hours to meet the requirements. If you don't meet them you'll become back a Commoner and your multiplier will drop to the default factor of 1.0.
The Noble Title of Yeoman will remain in your possession as long as your EGO balance doesn't drop below 500,000.