Correct spelling for the English word "standerby" is [stˈandəbi], [stˈandəbi], [s_t_ˈa_n_d_ə_b_i] (IPA phonetic alphabet).
The word "standerby" is not a commonly used term in modern English. It appears to be a combination of the words "stand" and "by", which are separate words with their own individual etymologies.
The word "stand" dates back to Old English as "standan", derived from the Proto-Germanic word "standaną". It has roots in the ancient Indo-European language and can be traced back to the Proto-Indo-European root "*steh₂-", meaning "to stand".
The word "by" also has Old English origins and comes from the Proto-Germanic word "bi". This word is related to the Proto-Indo-European root "*ambhi", meaning "around".
Therefore, the etymology of "standerby" would be a compound of these two words, which essentially means someone who stands nearby or is present nearby.