万: The term "quantity unit" signifies abundance and encompasses the meaning of "all." Being fortunate beyond measure is an auspicious repetition, which is highly beneficial for one's health when used in a name.
猜: To speculate, to conjecture, to surmise, to guess. Used to describe a person who is prone to suspicion.
Meaning: The name has a smooth phonetic flow, with 'Wan' signifying abundance and 'Cai' representing thought and wisdom.