diff --git a/ClosedXML/Excel/Tables/XLTable.cs b/ClosedXML/Excel/Tables/XLTable.cs
index 528eb6d..4c70fc1 100644
--- a/ClosedXML/Excel/Tables/XLTable.cs
+++ b/ClosedXML/Excel/Tables/XLTable.cs
@@ -22,13 +22,14 @@
         public XLTable(XLRange range, Boolean addToTables, Boolean setAutofilter = true)
             : base(new XLRangeParameters(range.RangeAddress, range.Style))
         {
+            CheckRangeNotInTable(range);
             InitializeValues(setAutofilter);
 
             Int32 id = 1;
             while (true)
             {
                 string tableName = String.Concat("Table", id);
-                if (Worksheet.Tables.All(t => t.Name != tableName))
+                if (!Worksheet.Tables.Any(t => t.Name.Equals(tableName, StringComparison.OrdinalIgnoreCase)))
                 {
                     Name = tableName;
                     AddToTables(range, addToTables);
@@ -41,6 +42,7 @@
         public XLTable(XLRange range, String name, Boolean addToTables, Boolean setAutofilter = true)
             : base(new XLRangeParameters(range.RangeAddress, range.Style))
         {
+            CheckRangeNotInTable(range);
             InitializeValues(setAutofilter);
 
             Name = name;
@@ -858,5 +860,12 @@
 
             return table;
         }
+
+        private static void CheckRangeNotInTable(XLRange range)
+        {
+            var overlappingTables = range.Worksheet.Tables.Where(t => t.RangeUsed().Intersects(range));
+            if (overlappingTables.Any())
+                throw new ArgumentException(nameof(range), $"The range {range.RangeAddress.ToStringRelative(true)} is already part of table '{overlappingTables.First().Name}'");
+        }
     }
 }
diff --git a/ClosedXML_Tests/Excel/Tables/TablesTests.cs b/ClosedXML_Tests/Excel/Tables/TablesTests.cs
index e5868fa..f440bd3 100644
--- a/ClosedXML_Tests/Excel/Tables/TablesTests.cs
+++ b/ClosedXML_Tests/Excel/Tables/TablesTests.cs
@@ -763,6 +763,24 @@
             }
         }
 
+        [Test]
+        public void CannotCreateDuplicateTablesOverSameRange()
+        {
+            var l = new List<TestObjectWithAttributes>()
+            {
+                new TestObjectWithAttributes() { Column1 = "a", Column2 = "b", MyField = 4, UnOrderedColumn = 999 },
+                new TestObjectWithAttributes() { Column1 = "c", Column2 = "d", MyField = 5, UnOrderedColumn = 777 }
+            };
+
+            using (var wb = new XLWorkbook())
+            {
+                IXLWorksheet ws = wb.AddWorksheet("Sheet1");
+                ws.FirstCell().InsertTable(l);
+                Assert.Throws<ArgumentException>(() => ws.RangeUsed().CreateTable());
+            }
+
+        }
+
         //TODO: Delete table (not underlying range)
     }
 }