Can you decipher what this seal stamp says and means? I am told that this seal stamp character(s) are from the Chinese dialect, though I got it from my Japanese grandmother.  She had it made and gave it to me. I was told it says 'strong and smart' and also resembles my name 'Matthew'.

I have not been able to find the characters that are shown on the stamp, and do not know either language well. Can someone help me with what the characters say and mean, or where to find them, along with anything else?
The the characters on the stamp were written in 小篆(xiao zhuan), which is an ancient Chinese writing form. The character on the right is 麥, which means wheat. The character on the left is 菲, which means the fragrance of plants. I don't know how those two characters could relate to 'strong and smart'. I think the combination of the two characters might have a specific meaning in Japanese, since there are also Chinese characters in Japanese.