All emperors are surnamed Zhu. Except the name of Zhu Yuanzhang's son, the rest are all three words, namely surname+seniority+five elements.
The second word (generational) of each emperor's name is strictly in accordance with the genealogy formulated by Zhu Yuanzhang, so as long as you remember the 20 words in his genealogy, you can understand the truth of the five elements "aquatic wood, wood fire, fire born soil, native gold, gold born water", and the name of the Ming emperor can come at once.
Zhujiajian genealogy 20 words:
I look forward to seeing you together. You are always generous, kind and personable, and Emperor Jian Jing is the first to care.