I am researching about a Chinese poet who wrote in Spanish as "A. Kuan Veng". This is surely an approximation of his name in Spanish, however, in his seal appear four characters: I am pretty sure three of them are: 關, 景 and 南 I would be deeply thankful if you give me the last character, and also a possible dialect for the writer, since Mandarin 關 /guān/ is almost a perfect phonological match with the Spanish pronunciation of "Kuan", but Mandarin 景 /jǐng/ and /nán/ do not start with a /a/ vowel sound nor are similar to "Veng".
Thanks a lot.