diff --git a/xsd/xsd.go b/xsd/xsd.go
index ef3d35b..491afa2 100644
--- a/xsd/xsd.go
+++ b/xsd/xsd.go
@@ -317,6 +317,34 @@ func XMLName(t Type) xml.Name {
 	panic(fmt.Sprintf("xsd: unexpected xsd.Type %[1]T %[1]v passed to XMLName", t))
 }
 
+func XMLNamePtr(t Type) *xml.Name {
+	switch t := t.(type) {
+	case *SimpleType:
+		return &t.Name
+	case *ComplexType:
+		return &t.Name
+	case Builtin:
+		return &xml.Name{Space: t.Name().Space, Local: t.Name().Local}
+	case linkedType:
+		return &xml.Name{Space: t.Space, Local: t.Local}
+	}
+	panic(fmt.Sprintf("xsd: unexpected xsd.Type %[1]T %[1]v passed to XMLNamePtr", t))
+}
+
+func Elements(t Type) *[]Element {
+	switch t := t.(type) {
+	case *SimpleType:
+		return &[]Element{}
+	case *ComplexType:
+		return &t.Elements
+	case Builtin:
+		return &[]Element{}
+	case linkedType:
+		return &[]Element{}
+	}
+	panic(fmt.Sprintf("xsd: unexpected xsd.Type %[1]T %[1]v passed to Elements", t))
+}
+
 // Base returns the base type that a Type is derived from.
 // If the value is of type Builtin, Base will return nil.
 func Base(t Type) Type {
diff --git a/xsdgen/cli.go b/xsdgen/cli.go
index e2ac7a0..c7d758a 100644
--- a/xsdgen/cli.go
+++ b/xsdgen/cli.go
@@ -55,6 +55,7 @@ func (cfg *Config) GenCode(data ...[]byte) (*Code, error) {
 // GenAST creates an *ast.File containing type declarations and
 // associated methods based on a set of XML schema.
 func (cfg *Config) GenAST(files ...string) (*ast.File, error) {
+	cfg.filesRead = make(map[string]bool)
 	data, err := cfg.readFiles(files...)
 	code, err := cfg.GenCode(data...)
 	if err != nil {
@@ -66,6 +67,10 @@ func (cfg *Config) GenAST(files ...string) (*ast.File, error) {
 func (cfg *Config) readFiles(files ...string) ([][]byte, error) {
 	data := make([][]byte, 0, len(files))
 	for _, filename := range files {
+		if _, ok := cfg.filesRead[filename]; ok {
+			// skip reading the file again
+			continue
+		}
 		path, err := filepath.Abs(filename)
 		if err != nil {
 			return nil, err
@@ -75,6 +80,7 @@ func (cfg *Config) readFiles(files ...string) ([][]byte, error) {
 			return nil, err
 		}
 		cfg.debugf("read %s(%s)", path, filename)
+		cfg.filesRead[filename] = true
 		if cfg.followImports {
 			dir := filepath.Dir(path)
 			importedRefs, err := xsd.Imports(b)
diff --git a/xsdgen/config.go b/xsdgen/config.go
index a14b6be..360aac8 100644
--- a/xsdgen/config.go
+++ b/xsdgen/config.go
@@ -46,6 +46,9 @@ type Config struct {
 	// if populated, only types that are true in this map
 	// will be selected.
 	allowTypes map[xml.Name]bool
+
+	// keep track of files that are read already to avoid reading it again
+	filesRead map[string]bool
 }
 
 type typeTransform func(xsd.Schema, xsd.Type) xsd.Type
diff --git a/xsdgen/xsdgen.go b/xsdgen/xsdgen.go
index e2c1e3c..a9bd539 100644
--- a/xsdgen/xsdgen.go
+++ b/xsdgen/xsdgen.go
@@ -172,7 +172,30 @@ func (cfg *Config) gen(primaries, deps []xsd.Schema) (*Code, error) {
 		}
 	}
 
+	rename := make(map[xml.Name]string)
+	types := make(map[string]string)
+
+	// Check for any duplicate names between namespaces
+	for i, primary := range primaries {
+		for k, _ := range primary.Types {
+			if !strings.HasPrefix(k.Local, "_") && types[k.Local] != "" && types[k.Local] != k.Space {
+				rename[k] = k.Local + fmt.Sprint(i)
+			} else {
+				types[k.Local] = k.Space
+			}
+		}
+	}
+
 	for _, primary := range primaries {
+		// Rename duplicate types so they generate properly
+		for _, v := range primary.Types {
+			for i := range *xsd.Elements(v) {
+				if val, exists := rename[*xsd.XMLNamePtr((*xsd.Elements(v))[i].Type)]; exists {
+					xsd.XMLNamePtr((*xsd.Elements(v))[i].Type).Local = val
+				}
+			}
+		}
+
 		cfg.debugf("flattening type hierarchy for schema %q", primary.TargetNS)
 		types := cfg.flatten(primary.Types)
 		types = cfg.expandComplexTypes(types)