Literature Reference: 无明确出处，但“俞”字在古代常用于人名，表示答应、允诺；“勉”字出自《论语·述而》：“勉而行之。” No specific source, but 'Yu' was often used in ancient names, signifying agreement or promise; 'Mian' comes from 'The Analects of Confucius·Shu Er': 'Persevere and practice it.'
俞: "Permission granted, with a joyful and harmonious demeanor."
勉:
Encouragement and diligence, symbolizing earnestness in work, lead to the accomplishment of great deeds.
Meaning: The name implies a promise to oneself to persevere and strive for continuous improvement.