diff --git a/src/Filee.Engines/Geo/GeoCsvFormat.cs b/src/Filee.Engines/Geo/GeoCsvFormat.cs
index c7c9e197c..b8070072f 100644
--- a/src/Filee.Engines/Geo/GeoCsvFormat.cs
+++ b/src/Filee.Engines/Geo/GeoCsvFormat.cs
@@ -142,20 +142,23 @@ public static void Write(GeoDataset dataset, string path, CancellationToken canc
     {
         var columns = dataset.Columns();
         var geometries = dataset.Features.Select(f => f.Geometry).OfType<GeoGeometry>().ToList();
-        // An attribute that already is a longitude or latitude column would be mistaken for the geometry when the CSV is
-        // read again, so such a dataset gets its geometry as WKT.
-        var ambiguous = columns.Any(c => LonNames.Contains(Key(c)) || LatNames.Contains(Key(c)));
+        // An attribute that already is a longitude, latitude or WKT column would be mistaken for the geometry when the
+        // CSV is read again, so such a dataset gets its geometry as WKT.
+        var ambiguous = columns.Any(c => LonNames.Contains(Key(c)) || LatNames.Contains(Key(c)) || WktNames.Contains(Key(c)));
         var points = !ambiguous && geometries.Count > 0 && geometries.All(g => g is GeoPoint);
         var withHeight = points && geometries.Any(g => g.HasZ);
 
-        string[] geometryColumns = !points ? ["wkt"] : withHeight ? ["longitude", "latitude", "elevation"] : ["longitude", "latitude"];
-        // An attribute that already has one of these names keeps it; the geometry column gets "_geo" after it.
+        // The generated WKT header uses the reader's first candidate when an attribute already does, so its leading column wins on read.
+        var wktColumn = columns.Any(c => Key(c) == WktNames[0]) ? "wkt_geo" : "wkt";
+        string[] geometryColumns = !points ? [wktColumn] : withHeight ? ["longitude", "latitude", "elevation"] : ["longitude", "latitude"];
+        // An attribute that already has one of these names keeps it; the geometry column gets a suffix after it.
         var taken = new HashSet<string>(columns, StringComparer.OrdinalIgnoreCase);
         var geometryNames = geometryColumns.Select(name =>
         {
             var unique = name;
+            var suffix = Key(name) == WktNames[0] ? "_" : "_geo";
             while (!taken.Add(unique))
-                unique += "_geo";
+                unique += suffix;
             return unique;
         }).ToList();
 
diff --git a/tests/Filee.Engines.Tests/GeoFormatTests.cs b/tests/Filee.Engines.Tests/GeoFormatTests.cs
index 2c77867a0..769e5bece 100644
--- a/tests/Filee.Engines.Tests/GeoFormatTests.cs
+++ b/tests/Filee.Engines.Tests/GeoFormatTests.cs
@@ -646,6 +646,44 @@ public async Task Csv_output_uses_wkt_when_an_attribute_is_already_called_longit
         Assert.Equal(111, Features(doc)[0].GetProperty("properties").GetProperty("LONGITUDE").GetInt64());
     }
 
+    [Theory]
+    [InlineData("shape")]
+    [InlineData("wkt")]
+    [InlineData("geometry")]
+    [InlineData("wkt_geo")]
+    [InlineData("WKT-GEO")]
+    [InlineData("WKT GEO")]
+    public async Task Csv_output_uses_wkt_when_an_attribute_is_already_called_a_wkt_column_name_so_it_reads_back_unchanged(string attribute)
+    {
+        var text = $$$"""{"type":"FeatureCollection","features":[{"type":"Feature","properties":{"{{{attribute}}}":"POINT (9 9)","n":1},"geometry":{"type":"Point","coordinates":[1,2]}}]}""";
+        var csv = (await fx.ConvertOkAsync(GeoFixtures.WriteText(fx, attribute + ".geojson", text), "csv")).Single();
+        using var doc = await ToGeoJsonAsync(csv);
+        Assert.Equal([1.0, 2.0], GeoFixtures.Position(Features(doc)[0].GetProperty("geometry")));
+        Assert.Equal("POINT (9 9)", Features(doc)[0].GetProperty("properties").GetProperty(attribute).GetString());
+    }
+
+    [Fact]
+    public async Task Csv_output_keeps_geometry_and_attributes_when_wkt_and_wkt_geo_are_both_attribute_names()
+    {
+        var text = """{"type":"FeatureCollection","features":[{"type":"Feature","properties":{"wkt":"POINT (9 9)","wkt_geo":"POINT (8 8)","n":1},"geometry":{"type":"Point","coordinates":[1,2]}}]}""";
+        var csv = (await fx.ConvertOkAsync(GeoFixtures.WriteText(fx, "wkt-both.geojson", text), "csv")).Single();
+        using var doc = await ToGeoJsonAsync(csv);
+        Assert.Equal([1.0, 2.0], GeoFixtures.Position(Features(doc)[0].GetProperty("geometry")));
+        Assert.Equal("POINT (9 9)", Features(doc)[0].GetProperty("properties").GetProperty("wkt").GetString());
+        Assert.Equal("POINT (8 8)", Features(doc)[0].GetProperty("properties").GetProperty("wkt_geo").GetString());
+    }
+
+    [Fact]
+    public async Task Csv_wkt_column_keeps_precedence_over_an_earlier_shape_column()
+    {
+        var (doc, _) = await CsvToGeoJsonAsync("shape,id,wkt\n\"POINT (9 9)\",1,\"POINT (1 2)\"\n");
+        using (doc)
+        {
+            Assert.Equal([1.0, 2.0], GeoFixtures.Position(Features(doc)[0].GetProperty("geometry")));
+            Assert.Equal("POINT (9 9)", Features(doc)[0].GetProperty("properties").GetProperty("shape").GetString());
+        }
+    }
+
     [Fact]
     public async Task Csv_output_quotes_commas_quotes_and_line_breaks()
     {