Firstly, I wanted to know if it is acceptable to use the word yonders? Originally I wanted to use it to indicate something at a far distance ("A figure yonders") but later on, I realised that I should have probably used yonder instead of yonders. This happened while writing a poem that I published last year. It is just one line- "A figure yonders". Even then, in a vague sense, is it grammatically right to say "A figure yonders"?
In a poem, it's perfectly alright. Yonder as a word is dated, but not archaic. Yonders on the other hand is not listed in modern dictionaries, although it does seem to have been a variant of yonder:
Seven and a Half years in the Far West (1843):
he made yonders sun -- and yonders moon -- and all them' are stars what shines at night
The Italian Husband (1698)
drag him along to yonders wheel, there he shall endless tortures feel