diff --git a/tools/import-normalizer/persons_tree.py b/tools/import-normalizer/persons_tree.py
index f6b1b3c8..66e1b660 100644
--- a/tools/import-normalizer/persons_tree.py
+++ b/tools/import-normalizer/persons_tree.py
@@ -128,3 +128,48 @@ def _resolve_one(raw: str, index: dict[str, list[str]]) -> tuple[str | None, str
     if len(hits) == 0:
         return None, "not_found"
     return None, "ambiguous"
+
+
+def _parse_row(row_num: int, fields: dict) -> dict:
+    """Produce one person record from a header-mapped row dict.
+
+    Internal keys prefixed with '_' are stripped before JSON output in main().
+    """
+    def s(key: str) -> str:
+        return (fields.get(key) or "").strip()
+
+    birth_raw = s("birth_date")
+    death_raw = s("death_date")
+
+    birth_year = _parse_year(birth_raw)
+    death_year = _parse_year(death_raw)
+
+    notes_parts = []
+    if birth_raw and birth_year is None:
+        notes_parts.append(f"[Geburtsdatum: {birth_raw}]")
+    if death_raw and death_year is None:
+        notes_parts.append(f"[Todesdatum: {death_raw}]")
+    bemerkung = s("notes")
+    if bemerkung:
+        notes_parts.append(bemerkung)
+
+    maiden = s("maiden_name") or None
+    spouse = s("spouse") or None
+    bemerkung_out = bemerkung or None
+
+    return {
+        "rowId": f"row_{row_num:03d}",
+        "firstName": s("first_name"),
+        "lastName": s("last_name"),
+        "maidenName": maiden,
+        "alias": None,
+        "notes": " ".join(notes_parts) or None,
+        "birthYear": birth_year,
+        "deathYear": death_year,
+        "birthPlace": s("birth_place") or None,
+        "deathPlace": s("death_place") or None,
+        "generation": _parse_generation(s("generation")),
+        "familyMember": True,
+        "_spouse_raw": spouse,
+        "_bemerkung_raw": bemerkung_out,
+    }
diff --git a/tools/import-normalizer/tests/test_persons_tree.py b/tools/import-normalizer/tests/test_persons_tree.py
index 8b040e1d..4b509156 100644
--- a/tools/import-normalizer/tests/test_persons_tree.py
+++ b/tools/import-normalizer/tests/test_persons_tree.py
@@ -171,3 +171,61 @@ def test_resolve_one_ambiguous():
     row_id, reason = persons_tree._resolve_one("Cram", idx)
     assert row_id is None
     assert reason == "ambiguous"
+
+
+def test_parse_row_serial_dates():
+    fields = {
+        "generation": "G 3", "last_name": "Allemeyer", "first_name": "Elsgard",
+        "maiden_name": "Wöhler", "birth_date": "7568", "birth_place": "Garz",
+        "death_date": "36222", "death_place": "Espelkamp",
+        "spouse": "Allemeyer Werner", "notes": "Nichte von Herbert",
+    }
+    p = persons_tree._parse_row(2, fields)
+    assert p["rowId"] == "row_002"
+    assert p["firstName"] == "Elsgard"
+    assert p["lastName"] == "Allemeyer"
+    assert p["maidenName"] == "Wöhler"
+    assert p["birthYear"] == 1920
+    assert p["deathYear"] == 1999
+    assert p["birthPlace"] == "Garz"
+    assert p["deathPlace"] == "Espelkamp"
+    assert p["generation"] == 3
+    assert p["familyMember"] is True
+    assert p["_spouse_raw"] == "Allemeyer Werner"
+    assert p["_bemerkung_raw"] == "Nichte von Herbert"
+    assert "[Geburtsdatum" not in (p["notes"] or "")
+
+
+def test_parse_row_string_birth_date():
+    fields = {
+        "generation": "G 2", "last_name": "Cram", "first_name": "Herbert",
+        "maiden_name": "", "birth_date": "25.6.1890", "birth_place": "Texas",
+        "death_date": "", "death_place": "", "spouse": "", "notes": "",
+    }
+    p = persons_tree._parse_row(28, fields)
+    assert p["birthYear"] == 1890
+    assert p["deathYear"] is None
+    assert p["notes"] is None or p["notes"] == ""
+
+
+def test_parse_row_unresolvable_date_goes_to_notes():
+    fields = {
+        "generation": "G 3", "last_name": "Heydrich", "first_name": "Dieter",
+        "maiden_name": "", "birth_date": "28.9.", "birth_place": "",
+        "death_date": "", "death_place": "", "spouse": "", "notes": "Bruder v Ingrid",
+    }
+    p = persons_tree._parse_row(96, fields)
+    assert p["birthYear"] is None
+    assert "[Geburtsdatum: 28.9.]" in p["notes"]
+    assert "Bruder v Ingrid" in p["notes"]
+
+
+def test_parse_row_empty_spouse_and_notes():
+    fields = {
+        "generation": "G 4", "last_name": "Allemeyer", "first_name": "Jürgen",
+        "maiden_name": "", "birth_date": "", "birth_place": "",
+        "death_date": "", "death_place": "", "spouse": "", "notes": "",
+    }
+    p = persons_tree._parse_row(4, fields)
+    assert p["_spouse_raw"] is None
+    assert p["_bemerkung_raw"] is None