diff --git a/src/core/ddsc/include/ddsc/dds.h b/src/core/ddsc/include/ddsc/dds.h
index 1044c4a..4237d42 100644
--- a/src/core/ddsc/include/ddsc/dds.h
+++ b/src/core/ddsc/include/ddsc/dds.h
@@ -1611,7 +1611,7 @@ dds_dispose_ts(
  *
  * <b><i>Instance Handle</i></b><br>
  * The given instance handle must correspond to the value that was returned by either
- * the dds_register_instance operation, dds_register_instance_ts or dds_instance_lookup.
+ * the dds_register_instance operation, dds_register_instance_ts or dds_lookup_instance.
  * If there is no correspondence, then the result of the operation is unspecified.
  *
  * @param[in]  writer The writer to dispose the data instance from.
@@ -3051,7 +3051,7 @@ dds_return_loan(
     T x = { ... };
     T y;
     dds_instance_handle_t ih;
-    ih = dds_instance_lookup (e, &x);
+    ih = dds_lookup_instance (e, &x);
     dds_instance_get_key (e, ih, &y);
 */
 
@@ -3065,7 +3065,14 @@ dds_return_loan(
  */
 _Pre_satisfies_(entity & DDS_ENTITY_KIND_MASK)
 DDS_EXPORT dds_instance_handle_t
-dds_instance_lookup(
+dds_lookup_instance(
+        dds_entity_t entity,
+        const void *data);
+
+_Pre_satisfies_(entity & DDS_ENTITY_KIND_MASK)
+DDS_EXPORT dds_instance_handle_t
+DDS_DEPRECATED_EXPORT
+dds_instance_lookup (
         dds_entity_t entity,
         const void *data);
 
diff --git a/src/core/ddsc/src/dds_instance.c b/src/core/ddsc/src/dds_instance.c
index f1f6ec4..2a5cff3 100644
--- a/src/core/ddsc/src/dds_instance.c
+++ b/src/core/ddsc/src/dds_instance.c
@@ -375,7 +375,7 @@ dds_dispose_ih_ts(
 
 _Pre_satisfies_(entity & DDS_ENTITY_KIND_MASK)
 dds_instance_handle_t
-dds_instance_lookup(
+dds_lookup_instance(
         dds_entity_t entity,
         const void *data)
 {
@@ -401,6 +401,15 @@ err:
     return ih;
 }
 
+_Pre_satisfies_(entity & DDS_ENTITY_KIND_MASK)
+dds_instance_handle_t
+dds_instance_lookup (
+        dds_entity_t entity,
+        const void *data)
+{
+    return dds_lookup_instance(entity, data);
+}
+
 _Pre_satisfies_(entity & DDS_ENTITY_KIND_MASK)
 dds_return_t
 dds_instance_get_key(
diff --git a/src/core/ddsc/tests/dispose.c b/src/core/ddsc/tests/dispose.c
index 343232a..45b7960 100644
--- a/src/core/ddsc/tests/dispose.c
+++ b/src/core/ddsc/tests/dispose.c
@@ -903,7 +903,7 @@ CU_Theory((dds_entity_t *writer), ddsc_dispose_ih, non_writers, .init=disposing_
 CU_Test(ddsc_dispose_ih, disposing_old_instance, .init=disposing_init, .fini=disposing_fini)
 {
     Space_Type1 oldInstance = { 0, 22, 22 };
-    dds_instance_handle_t hdl = dds_instance_lookup(g_writer, &oldInstance);
+    dds_instance_handle_t hdl = dds_lookup_instance(g_writer, &oldInstance);
     dds_return_t ret;
 
     ret = dds_dispose_ih(g_writer, hdl);
@@ -1001,7 +1001,7 @@ CU_Theory((dds_entity_t *writer), ddsc_dispose_ih_ts, non_writers, .init=disposi
 CU_Test(ddsc_dispose_ih_ts, disposing_old_instance, .init=disposing_init, .fini=disposing_fini)
 {
     Space_Type1 oldInstance = { 0, 22, 22 };
-    dds_instance_handle_t hdl = dds_instance_lookup(g_writer, &oldInstance);
+    dds_instance_handle_t hdl = dds_lookup_instance(g_writer, &oldInstance);
     dds_return_t ret;
 
     ret = dds_dispose_ih_ts(g_writer, hdl, g_present);
@@ -1043,7 +1043,7 @@ CU_Test(ddsc_dispose_ih_ts, disposing_old_instance, .init=disposing_init, .fini=
 CU_Test(ddsc_dispose_ih_ts, disposing_past_sample, .init=disposing_init, .fini=disposing_fini)
 {
     Space_Type1 oldInstance = { 0, 0, 0 };
-    dds_instance_handle_t hdl = dds_instance_lookup(g_writer, &oldInstance);
+    dds_instance_handle_t hdl = dds_lookup_instance(g_writer, &oldInstance);
     dds_return_t ret;
 
     /* Disposing a sample in the past should trigger a lost sample. */
diff --git a/src/core/ddsc/tests/read_instance.c b/src/core/ddsc/tests/read_instance.c
index 4548e0a..3230930 100644
--- a/src/core/ddsc/tests/read_instance.c
+++ b/src/core/ddsc/tests/read_instance.c
@@ -236,7 +236,7 @@ read_instance_init(void)
     sample.long_1 = 0;
     sample.long_2 = 0;
     sample.long_3 = 0;
-    g_hdl_valid = dds_instance_lookup(g_reader, &sample);
+    g_hdl_valid = dds_lookup_instance(g_reader, &sample);
     CU_ASSERT_NOT_EQUAL_FATAL(g_hdl_valid, DDS_HANDLE_NIL);
 
     dds_delete_qos(qos);
diff --git a/src/core/ddsc/tests/register.c b/src/core/ddsc/tests/register.c
index f8c9d24..7c36fc1 100644
--- a/src/core/ddsc/tests/register.c
+++ b/src/core/ddsc/tests/register.c
@@ -199,23 +199,22 @@ CU_Test(ddsc_register_instance, registering_new_instance, .init=registering_init
     dds_instance_handle_t instHndl, instHndl2;
     dds_return_t ret;
     Space_Type1 newInstance = { INITIAL_SAMPLES, 0, 0 };
-    instHndl = dds_instance_lookup(g_writer, &newInstance);
+    instHndl = dds_lookup_instance(g_writer, &newInstance);
     CU_ASSERT_EQUAL_FATAL(instHndl, DDS_HANDLE_NIL);
     ret = dds_register_instance(g_writer, &instHndl2, &newInstance);
     CU_ASSERT_EQUAL_FATAL(ret, DDS_RETCODE_OK);
-    instHndl = dds_instance_lookup(g_writer, &newInstance);
     CU_ASSERT_EQUAL_FATAL(instHndl, instHndl2);
+    instHndl = dds_lookup_instance(g_writer, &newInstance);
 }
 
 CU_Test(ddsc_register_instance, data_already_available, .init=registering_init, .fini=registering_fini)
 {
     dds_instance_handle_t instHndl, instHndl2;
     dds_return_t ret;
-    instHndl = dds_instance_lookup(g_writer, &g_data);
+    instHndl = dds_lookup_instance(g_writer, &g_data);
     CU_ASSERT_NOT_EQUAL_FATAL(instHndl, DDS_HANDLE_NIL);
     ret = dds_register_instance(g_writer, &instHndl2, &g_data);
     CU_ASSERT_EQUAL_FATAL(ret, DDS_RETCODE_OK);
     CU_ASSERT_EQUAL_FATAL(instHndl2, instHndl);
-
 }
 
diff --git a/src/core/ddsc/tests/take_instance.c b/src/core/ddsc/tests/take_instance.c
index a943602..4911729 100644
--- a/src/core/ddsc/tests/take_instance.c
+++ b/src/core/ddsc/tests/take_instance.c
@@ -237,7 +237,7 @@ take_instance_init(void)
     sample.long_1 = 0;
     sample.long_2 = 0;
     sample.long_3 = 0;
-    g_hdl_valid = dds_instance_lookup(g_reader, &sample);
+    g_hdl_valid = dds_lookup_instance(g_reader, &sample);
     CU_ASSERT_NOT_EQUAL_FATAL(g_hdl_valid, DDS_HANDLE_NIL);
 
     dds_delete_qos(qos);
diff --git a/src/core/ddsc/tests/unregister.c b/src/core/ddsc/tests/unregister.c
index a30aabf..7a26ea1 100644
--- a/src/core/ddsc/tests/unregister.c
+++ b/src/core/ddsc/tests/unregister.c
@@ -427,7 +427,7 @@ CU_Theory((dds_entity_t *writer), ddsc_unregister_instance_ih, non_writers, .ini
 CU_Test(ddsc_unregister_instance_ih, unregistering_old_instance, .init=unregistering_init, .fini=unregistering_fini)
 {
     Space_Type1 oldInstance = { 0, 22, 22 };
-    dds_instance_handle_t hdl = dds_instance_lookup(g_writer, &oldInstance);
+    dds_instance_handle_t hdl = dds_lookup_instance(g_writer, &oldInstance);
     dds_return_t ret;
 
     ret = dds_unregister_instance_ih(g_writer, hdl);
@@ -525,7 +525,7 @@ CU_Theory((dds_entity_t *writer), ddsc_unregister_instance_ih_ts, non_writers, .
 CU_Test(ddsc_unregister_instance_ih_ts, unregistering_old_instance, .init=unregistering_init, .fini=unregistering_fini)
 {
     Space_Type1 oldInstance = { 0, 22, 22 };
-    dds_instance_handle_t hdl = dds_instance_lookup(g_writer, &oldInstance);
+    dds_instance_handle_t hdl = dds_lookup_instance(g_writer, &oldInstance);
     dds_return_t ret;
 
     ret = dds_unregister_instance_ih_ts(g_writer, hdl, g_present);
@@ -567,7 +567,7 @@ CU_Test(ddsc_unregister_instance_ih_ts, unregistering_old_instance, .init=unregi
 CU_Test(ddsc_unregister_instance_ih_ts, unregistering_past_sample, .init=unregistering_init, .fini=unregistering_fini)
 {
     Space_Type1 oldInstance = { 0, 0, 0 };
-    dds_instance_handle_t hdl = dds_instance_lookup(g_writer, &oldInstance);
+    dds_instance_handle_t hdl = dds_lookup_instance(g_writer, &oldInstance);
     dds_attach_t triggered;
     dds_return_t ret;