Lavender 40/42 oil is commonly used in soaps. It has a highly floral scent but it's more camphoraceous than English lavender, which gives it more of a soapy nuance. Spanish rosemary oil is high in camphor, which also makes it smell quite soapy. Rose alcohol is commonly used in soaps, as are geranium oil and palmarosa oil. If linalool, geraniol, or citronellol are listed in the ingredients, then there's a reasonable chance that it's from one or more of these ingredients. If not, then perhaps it's an aroma chemical.