diff --git a/syft/pkg/cataloger/python/cataloger_test.go b/syft/pkg/cataloger/python/cataloger_test.go
index 25fa4cc7e..d64dbb56a 100644
--- a/syft/pkg/cataloger/python/cataloger_test.go
+++ b/syft/pkg/cataloger/python/cataloger_test.go
@@ -567,6 +567,7 @@ func Test_PackageCataloger_Relationships(t *testing.T) {
 				"colorama @ 0.4.6 (.) [dependency-of] pygments @ 2.18.0 (.)",
 				"colorama @ 0.4.6 (.) [dependency-of] uvicorn @ 0.29.0 (.)", // proof of uvicorn[standard]
 				"dnspython @ 2.6.1 (.) [dependency-of] email-validator @ 2.1.1 (.)",
+				"email-validator @ 2.1.1 (.) [dependency-of] fastapi @ 0.111.0 (.)",
 				"email-validator @ 2.1.1 (.) [dependency-of] pydantic @ 2.7.1 (.)",
 				"fastapi @ 0.111.0 (.) [dependency-of] fastapi-cli @ 0.0.4 (.)",
 				"fastapi-cli @ 0.0.4 (.) [dependency-of] fastapi @ 0.111.0 (.)",
diff --git a/syft/pkg/cataloger/python/dependency.go b/syft/pkg/cataloger/python/dependency.go
index 0e0595760..cc70159cb 100644
--- a/syft/pkg/cataloger/python/dependency.go
+++ b/syft/pkg/cataloger/python/dependency.go
@@ -181,7 +181,9 @@ func extractPackageName(s string) string {
 	// requests (>= 2.8.1)			--> requests
 	// requests ; python_version < "2.7"	--> requests
 
-	return strings.TrimSpace(internal.SplitAny(s, "[(<!=>~;")[0])
+	name := strings.TrimSpace(internal.SplitAny(s, "[(<!=>~;")[0])
+	// normalize the name to match how packages are stored (lowercase, with hyphens instead of underscores)
+	return normalize(name)
 }
 
 // extractPackageNames applies extractPackageName to each string in the slice.
diff --git a/syft/pkg/cataloger/python/dependency_test.go b/syft/pkg/cataloger/python/dependency_test.go
index 8a8780f42..1dceda546 100644
--- a/syft/pkg/cataloger/python/dependency_test.go
+++ b/syft/pkg/cataloger/python/dependency_test.go
@@ -222,7 +222,7 @@ func Test_poetryLockDependencySpecifier_againstPoetryLock(t *testing.T) {
 					Variants: []dependency.ProvidesRequires{
 						{
 							Provides: []string{"requests[socks]"},
-							Requires: []string{"PySocks"},
+							Requires: []string{"pysocks"},
 						},
 						{
 							Provides: []string{"requests[use-chardet-on-py3]"},
@@ -276,6 +276,162 @@ func Test_poetryLockDependencySpecifier_againstPoetryLock(t *testing.T) {
 	}
 }
 
+func Test_extractPackageName(t *testing.T) {
+	tests := []struct {
+		name  string
+		input string
+		want  string
+	}{
+		{
+			name:  "simple package name",
+			input: "requests",
+			want:  "requests",
+		},
+		{
+			name:  "package with version constraint",
+			input: "requests >= 2.8.1",
+			want:  "requests",
+		},
+		{
+			name:  "package with parentheses version constraint",
+			input: "requests (>= 2.8.1)",
+			want:  "requests",
+		},
+		{
+			name:  "package with extras",
+			input: "requests[security,tests]",
+			want:  "requests",
+		},
+		{
+			name:  "package with extras and version",
+			input: "requests[security] >= 2.8.1",
+			want:  "requests",
+		},
+		{
+			name:  "package with environment marker",
+			input: "requests ; python_version < \"2.7\"",
+			want:  "requests",
+		},
+		{
+			name:  "package with everything",
+			input: "requests[security] >= 2.8.1 ; python_version < \"3\"",
+			want:  "requests",
+		},
+		{
+			name:  "package name with capitals (normalization test)",
+			input: "Werkzeug (>=0.15)",
+			want:  "werkzeug",
+		},
+		{
+			name:  "package name with mixed case",
+			input: "Jinja2 (>=2.10.1)",
+			want:  "jinja2",
+		},
+		{
+			name:  "package name with underscores",
+			input: "some_package >= 1.0",
+			want:  "some-package",
+		},
+		{
+			name:  "package name with mixed separators",
+			input: "Some_Package.Name >= 1.0",
+			want:  "some-package-name",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := extractPackageName(tt.input)
+			assert.Equal(t, tt.want, got)
+		})
+	}
+}
+
+func Test_wheelEggDependencySpecifier(t *testing.T) {
+	tests := []struct {
+		name string
+		p    pkg.Package
+		want dependency.Specification
+	}{
+		{
+			name: "no dependencies",
+			p: pkg.Package{
+				Name: "foo",
+				Metadata: pkg.PythonPackage{
+					RequiresDist: []string{},
+				},
+			},
+			want: dependency.Specification{
+				ProvidesRequires: dependency.ProvidesRequires{
+					Provides: []string{"foo"},
+				},
+			},
+		},
+		{
+			name: "simple dependencies",
+			p: pkg.Package{
+				Name: "requests",
+				Metadata: pkg.PythonPackage{
+					RequiresDist: []string{
+						"certifi>=2017.4.17",
+						"urllib3<1.27,>=1.21.1",
+					},
+				},
+			},
+			want: dependency.Specification{
+				ProvidesRequires: dependency.ProvidesRequires{
+					Provides: []string{"requests"},
+					Requires: []string{"certifi", "urllib3"},
+				},
+			},
+		},
+		{
+			name: "dependencies with capital letters (Flask-like)",
+			p: pkg.Package{
+				Name: "flask",
+				Metadata: pkg.PythonPackage{
+					RequiresDist: []string{
+						"Werkzeug (>=0.15)",
+						"Jinja2 (>=2.10.1)",
+						"itsdangerous (>=0.24)",
+						"click (>=5.1)",
+					},
+				},
+			},
+			want: dependency.Specification{
+				ProvidesRequires: dependency.ProvidesRequires{
+					Provides: []string{"flask"},
+					// Requires are returned in the order they appear in RequiresDist
+					Requires: []string{"werkzeug", "jinja2", "itsdangerous", "click"},
+				},
+			},
+		},
+		{
+			name: "dependencies with extras",
+			p: pkg.Package{
+				Name: "foo",
+				Metadata: pkg.PythonPackage{
+					RequiresDist: []string{
+						"bar >= 1.0",
+						"pytest ; extra == 'dev'",
+						"sphinx ; extra == 'docs'",
+					},
+				},
+			},
+			want: dependency.Specification{
+				ProvidesRequires: dependency.ProvidesRequires{
+					Provides: []string{"foo"},
+					Requires: []string{"bar", "pytest", "sphinx"},
+				},
+			},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			assert.Equal(t, tt.want, wheelEggDependencySpecifier(tt.p))
+		})
+	}
+}
+
 func Test_pdmLockDependencySpecifier(t *testing.T) {
 
 	tests := []struct {