diff --git a/spring-boot/src/main/java/org/springframework/boot/bind/RelaxedNames.java b/spring-boot/src/main/java/org/springframework/boot/bind/RelaxedNames.java
index 6940df604c2..83b02dcc00d 100644
--- a/spring-boot/src/main/java/org/springframework/boot/bind/RelaxedNames.java
+++ b/spring-boot/src/main/java/org/springframework/boot/bind/RelaxedNames.java
@@ -97,13 +97,19 @@ public final class RelaxedNames implements Iterable<String> {
 				return value;
 			}
 		},
-		UNDERSCORE {
+		HYPHEN_TO_UNDERSCORE {
 			@Override
 			public String apply(String value) {
 				return value.replace("-", "_");
 			}
 		},
-		UNCAMELCASE {
+		PERIOD_TO_UNDERSCORE {
+			@Override
+			public String apply(String value) {
+				return value.replace(".", "_");
+			}
+		},
+		CAMELCASE_TO_UNDERSCORE {
 			@Override
 			public String apply(String value) {
 				value = value.replaceAll("([^A-Z-])([A-Z])", "$1_$2");
@@ -119,14 +125,18 @@ public final class RelaxedNames implements Iterable<String> {
 				return builder.toString();
 			}
 		},
-		CAMELCASE {
+		UNDERSCORE_TO_CAMELCASE {
 			@Override
 			public String apply(String value) {
 				StringBuilder builder = new StringBuilder();
-				for (String field : UNDERSCORE.apply(value).split("_")) {
+				for (String field : value.split("[_\\-.]")) {
 					builder.append(builder.length() == 0 ? field : StringUtils
 							.capitalize(field));
 				}
+				for (String suffix : new String[] { "_", "-", "." })
+					if (value.endsWith(suffix)) {
+						builder.append(suffix);
+					}
 				return builder.toString();
 			}
 		};
diff --git a/spring-boot/src/main/java/org/springframework/boot/bind/RelaxedPropertyResolver.java b/spring-boot/src/main/java/org/springframework/boot/bind/RelaxedPropertyResolver.java
index 541adf7938d..d37a9e02776 100644
--- a/spring-boot/src/main/java/org/springframework/boot/bind/RelaxedPropertyResolver.java
+++ b/spring-boot/src/main/java/org/springframework/boot/bind/RelaxedPropertyResolver.java
@@ -81,10 +81,9 @@ public class RelaxedPropertyResolver implements PropertyResolver {
 
 	@Override
 	public <T> T getProperty(String key, Class<T> targetType, T defaultValue) {
-		for (String relaxedKey : new RelaxedNames(key)) {
-			if (this.resolver.containsProperty(this.prefix + relaxedKey)) {
-				return this.resolver.getProperty(this.prefix + relaxedKey, targetType,
-						defaultValue);
+		for (String relaxedKey : new RelaxedNames(this.prefix + key)) {
+			if (this.resolver.containsProperty(relaxedKey)) {
+				return this.resolver.getProperty(relaxedKey, targetType, defaultValue);
 			}
 		}
 		return defaultValue;
@@ -92,10 +91,9 @@ public class RelaxedPropertyResolver implements PropertyResolver {
 
 	@Override
 	public <T> Class<T> getPropertyAsClass(String key, Class<T> targetType) {
-		for (String relaxedKey : new RelaxedNames(key)) {
-			if (this.resolver.containsProperty(this.prefix + relaxedKey)) {
-				return this.resolver.getPropertyAsClass(this.prefix + relaxedKey,
-						targetType);
+		for (String relaxedKey : new RelaxedNames(this.prefix + key)) {
+			if (this.resolver.containsProperty(relaxedKey)) {
+				return this.resolver.getPropertyAsClass(relaxedKey, targetType);
 			}
 		}
 		return null;
@@ -103,8 +101,8 @@ public class RelaxedPropertyResolver implements PropertyResolver {
 
 	@Override
 	public boolean containsProperty(String key) {
-		for (String relaxedKey : new RelaxedNames(key)) {
-			if (this.resolver.containsProperty(this.prefix + relaxedKey)) {
+		for (String relaxedKey : new RelaxedNames(this.prefix + key)) {
+			if (this.resolver.containsProperty(relaxedKey)) {
 				return true;
 			}
 		}
@@ -126,7 +124,7 @@ public class RelaxedPropertyResolver implements PropertyResolver {
 
 	/**
 	 * Return a Map of all values from all underlying properties that start with the
-	 * specified key. NOTE: this method can only be used in the underlying resolver is a
+	 * specified key. NOTE: this method can only be used if the underlying resolver is a
 	 * {@link ConfigurableEnvironment}.
 	 * @param keyPrefix the key prefix used to filter results
 	 * @return a map of all sub properties starting with the specified key prefix.
diff --git a/spring-boot/src/test/java/org/springframework/boot/bind/RelaxedNamesTests.java b/spring-boot/src/test/java/org/springframework/boot/bind/RelaxedNamesTests.java
index 6d99910a5b2..41728ea56fb 100644
--- a/spring-boot/src/test/java/org/springframework/boot/bind/RelaxedNamesTests.java
+++ b/spring-boot/src/test/java/org/springframework/boot/bind/RelaxedNamesTests.java
@@ -76,4 +76,27 @@ public class RelaxedNamesTests {
 		assertThat(iterator.hasNext(), equalTo(false));
 	}
 
+	@Test
+	public void fromPeriods() throws Exception {
+		Iterator<String> iterator = new RelaxedNames("spring.value").iterator();
+		assertThat(iterator.next(), equalTo("spring.value"));
+		assertThat(iterator.next(), equalTo("spring_value"));
+		assertThat(iterator.next(), equalTo("springValue"));
+		assertThat(iterator.next(), equalTo("springvalue"));
+		assertThat(iterator.next(), equalTo("SPRING.VALUE"));
+		assertThat(iterator.next(), equalTo("SPRING_VALUE"));
+		assertThat(iterator.next(), equalTo("SPRINGVALUE"));
+		assertThat(iterator.hasNext(), equalTo(false));
+	}
+
+	@Test
+	public void fromPrefixEndingInPeriod() throws Exception {
+		Iterator<String> iterator = new RelaxedNames("spring.").iterator();
+		assertThat(iterator.next(), equalTo("spring."));
+		assertThat(iterator.next(), equalTo("spring_"));
+		assertThat(iterator.next(), equalTo("SPRING."));
+		assertThat(iterator.next(), equalTo("SPRING_"));
+		assertThat(iterator.hasNext(), equalTo(false));
+	}
+
 }
diff --git a/spring-boot/src/test/java/org/springframework/boot/bind/RelaxedPropertyResolverTests.java b/spring-boot/src/test/java/org/springframework/boot/bind/RelaxedPropertyResolverTests.java
index fdcbd3c22b8..c9ec646a11f 100644
--- a/spring-boot/src/test/java/org/springframework/boot/bind/RelaxedPropertyResolverTests.java
+++ b/spring-boot/src/test/java/org/springframework/boot/bind/RelaxedPropertyResolverTests.java
@@ -144,6 +144,14 @@ public class RelaxedPropertyResolverTests {
 		assertThat(this.resolver.getProperty("d"), equalTo("test"));
 	}
 
+	@Test
+	public void prefixedRelaxed() throws Exception {
+		this.resolver = new RelaxedPropertyResolver(this.environment, "a.");
+		this.source.put("A_B", "test");
+		assertThat(this.resolver.containsProperty("b"), equalTo(true));
+		assertThat(this.resolver.getProperty("b"), equalTo("test"));
+	}
+
 	@Test
 	public void subProperties() throws Exception {
 		this.source.put("x.y.my-sub.a.b", "1");