First of all, do you know. Monk is not a title for all monks. Only a mage who has served as an abbot can be called a monk.
You want to engrave a seal for a monk, it’s very good. Usually this is the case. We generally refer to the name of a mage as Shangxia. For example, Master Xingyun. Our name is: Master Shangxingxiayun.
The master has become a monk. In China, all the surnames of the masters are: Shi. Master Xingyun is: Shi Xingyun. Therefore, you can engrave: Shi so-and-so. Or, release a certain seal.
Both Zhuwen and Baiwen are acceptable. The seal used by the master is often used together with Buddhist and French words. If you want to engrave a pair of seals. That can be: French seal (seal engraving), Dharma seal (yang engraving). When used, the French name is on top and the Dharma name is on the bottom.
You can read more calligraphy works by masters and see how they use seals. Master Hongyi is not only a master in Buddhism, but also a master in modern Chinese calligraphy and painting. He also has many seals. You can refer to it.
For reference only.