Comparative law notes
EN is polysemous. Add another meaning to our EN dict, which matches (full equivalent" the German term: "Issue" typically means a person's lineal descendants - all genetic descendants of a person, regardless of degree. Issue is a narrower category than heirs, which includes spouses, ancestors, and collaterals (siblings, cousins, aunts, and uncles). This meaning of issue arises most often in wills and trusts. A person who has no living lineal descendants is said to have died without issue. Wiki entry
