public IActionResult Edit(int personNameId, PersonNameEditModel editModel)
		{
			//
			// Get data
			//

			var name =
				_personData.GetPersonNameWithNavigation(personNameId);

			if (name == null)
				return NotFound();

			// Read to validate
			var person =
				_personData
					.ReadPersonWithNames(
						name.Person.PersonGuid);

			if (person == null)
				return NotFound();

			//
			// View helpers
			// Model must be ready if validation fails
			//

			editModel.NameCount = person.Names.Count;
			ViewData["PersonGuid"] = person.PersonGuid;

			//
			// Validate
			//

			var form =
				new PersonNameModelState(
					ModelState,
					new Logic.Validate.PersonName(
						editModel.Prefix,
						editModel.First,
						editModel.Middle,
						editModel.Last,
						editModel.Suffix,
						editModel.NameWeight),
					person.Names,
					name.PersonNameId);

			form.HasValidValues();
			if (!ModelState.IsValid) return View(editModel);

			form.HasUniquePersonNameToBeEdited();
			if (!ModelState.IsValid) return View(editModel);

			form.NameWeightHasValidNumber();
			if (!ModelState.IsValid) return View(editModel);

			//TODO check that the validation is the same as at the creation

			//
			// Edit
			//

			name.Prefix = editModel.Prefix;
			name.First = editModel.First;
			name.Middle = editModel.Middle;
			name.Last = editModel.Last;
			name.Suffix = editModel.Suffix;
			name.NameWeight = editModel.NameWeight;

			try
			{
				// Update name in form
				_personData.UpdatePersonName(name);

				// Addjust name weight at the other names
				_personData.AdjustAllNameWeightsButOne(
					person.PersonId,
					name.PersonNameId);
			}
			catch (DbUpdateException /* ex */)
			{
				// Log the error (uncomment ex variable name and write a log.)
				ModelState.AddModelError(
					"",
					"Unable to save changes. " +
					"Try again, and if the problem persists, " +
					"see your system administrator.");

				return View(editModel);
			}

			//
			// Update RDF
			//

			var readPerson =
				_personData.ReadAllPersonData(person.PersonGuid);
			if (readPerson != null)
				_rdfData.AddOrUpdatePerson(readPerson);

			//
			// Update search index
			//

			var names = new List<string>();

			person =
				_personData
					.ReadPersonWithNames(
						name.Person.PersonGuid);

			foreach (var n in person.Names.OrderByDescending(x => x.NameWeight))
			{
				var fullName =
					string.Join(" ", new[]
					{
						n.Prefix,
						n.First,
						n.Middle,
						n.Last,
						n.Suffix
					}.Where(x => !string.IsNullOrWhiteSpace(x)).ToArray());

				names.Add(fullName);
			}

			// TODO try catch to handle errors
			_personSearchIndex.MergeNames(
				person.PersonGuid.ToString(),
				names.ToArray());

			//
			// Redirect
			//

			return RedirectToAction(
				"Details",
				"Person",
				new { personGuid = name.Person.PersonGuid });
		}