firstcomer means one who comes first; a person or entity being the first to arrive, or the first in sequence. Lexicurio rates it Sui generis — a strength score of 88 out of 100.
Etymology
From first + comer.
noun
- One who comes first; a person or entity being the first to arrive, or the first in sequence.“Britain's phenomenal success as firstcomer in the new industrialism was reflected in her record 38 per cent share of the world trade in manufactures...”