sproul, sprallnouna sister, brother or daughter20-. Compare prawl, naismort’s prawl, naismort’s sprouletymology: possibly a development from Romany prawl ‘a brother’ or as attested by Galloway Tinkler-Gypsies ‘a daughter’; sense ‘sister, brother’ attested by SS; ‘brother’ attested by BS in TDITA; collected by EMcC/PSnote:
Canadian Paul Pope (2013) cites the form sproul ‘a brother; a daughter’.