diff --git a/GPy/core/parameterization/param.py b/GPy/core/parameterization/param.py
index 49d6682c..e49dbe2e 100644
--- a/GPy/core/parameterization/param.py
+++ b/GPy/core/parameterization/param.py
@@ -238,11 +238,6 @@ class Param(ObservableArray, Constrainable, Gradcheckable, Indexable, Parentable
     @property
     def _ties_str(self):
         return [t._short() for t in self._tied_to_] or ['']
-    @property
-    def name_hirarchical(self):
-        if self.has_parent():
-            return self._direct_parent_.hirarchy_name() + adjust_name_for_printing(self.name)
-        return adjust_name_for_printing(self.name)
     def __repr__(self, *args, **kwargs):
         name = "\033[1m{x:s}\033[0;0m:\n".format(
                             x=self.name_hirarchical)
@@ -284,7 +279,7 @@ class Param(ObservableArray, Constrainable, Gradcheckable, Indexable, Parentable
         return reduce(lambda a, b:max(a, len(str(b))), ind, len(__index_name__))
     def _short(self):
         # short string to print
-        name = self._direct_parent_.hirarchy_name() + adjust_name_for_printing(self.name)
+        name = self.hirarchy_name()
         if self._realsize_ < 2:
             return name
         ind = self._indices()
diff --git a/GPy/core/parameterization/parameter_core.py b/GPy/core/parameterization/parameter_core.py
index 9002adc3..2b2283c2 100644
--- a/GPy/core/parameterization/parameter_core.py
+++ b/GPy/core/parameterization/parameter_core.py
@@ -88,6 +88,10 @@ class Nameable(Parentable):
         self._name = name
         if self.has_parent():
             self._direct_parent_._name_changed(self, from_name)
+    def hirarchy_name(self):
+        if self.has_parent():
+            return self._direct_parent_.hirarchy_name() + "." + adjust_name_for_printing(self.name)
+        return adjust_name_for_printing(self.name)
 
 class Parameterizable(Parentable):
     def __init__(self, *args, **kwargs):
diff --git a/GPy/core/parameterization/parameterized.py b/GPy/core/parameterization/parameterized.py
index cef1daa2..f510d330 100644
--- a/GPy/core/parameterization/parameterized.py
+++ b/GPy/core/parameterization/parameterized.py
@@ -7,11 +7,11 @@ import cPickle
 import itertools
 from re import compile, _pattern_type
 from param import ParamConcatenation
-from parameter_core import Constrainable, Pickleable, Observable, Parameterizable, adjust_name_for_printing, Gradcheckable
+from parameter_core import Constrainable, Pickleable, Observable, Parameterizable, Parentable, adjust_name_for_printing, Gradcheckable
 from transformations import __fixed__
 from array_core import ParamList
 
-class Parameterized(Constrainable, Pickleable, Observable, Gradcheckable, Parameterizable):
+class Parameterized(Constrainable, Pickleable, Observable, Gradcheckable, Parameterizable, Parentable):
     """
     Parameterized class
 
@@ -212,7 +212,7 @@ class Parameterized(Constrainable, Pickleable, Observable, Gradcheckable, Parame
     # Optimization handles:
     #===========================================================================
     def _get_param_names(self):
-        n = numpy.array([p.name_hirarchical + '[' + str(i) + ']' for p in self.flattened_parameters for i in p._indices()])
+        n = numpy.array([p.hirarchy_name() + '[' + str(i) + ']' for p in self.flattened_parameters for i in p._indices()])
         return n
     def _get_param_names_transformed(self):
         n = self._get_param_names()
@@ -296,10 +296,6 @@ class Parameterized(Constrainable, Pickleable, Observable, Gradcheckable, Parame
         # you can retrieve the original param through this method, by passing
         # the copy here
         return self._parameters_[param._parent_index_]
-    def hirarchy_name(self):
-        if self.has_parent():
-            return self._direct_parent_.hirarchy_name() + adjust_name_for_printing(self.name) + "."
-        return ''
     #===========================================================================
     # Get/set parameters:
     #===========================================================================
@@ -309,8 +305,8 @@ class Parameterized(Constrainable, Pickleable, Observable, Gradcheckable, Parame
         """
         if not isinstance(regexp, _pattern_type): regexp = compile(regexp)
         found_params = []
-        for p in self._parameters_:
-            if regexp.match(p.name) is not None:
+        for p in self.flattened_parameters:
+            if regexp.match(p.hirarchy_name()) is not None:
                 found_params.append(p)
             if isinstance(p, Parameterized):
                 found_params.extend(p.grep_param_names(regexp))
@@ -352,11 +348,7 @@ class Parameterized(Constrainable, Pickleable, Observable, Gradcheckable, Parame
     # Printing:
     #===========================================================================
     def _short(self):
-        # short string to print
-        if self.has_parent():
-            return self._direct_parent_.hirarchy_name() + adjust_name_for_printing(self.name)
-        else:
-            return adjust_name_for_printing(self.name)
+        return self.hirarchy_name()
     @property
     def flattened_parameters(self):
         return [xi for x in self._parameters_ for xi in x.flattened_parameters]