U+1EF7 "ỷ" Latin Small Letter Y with Hook Above Unicode Character

U+1EF7 "ỷ" Latin Small Letter Y with Hook Above is a specialized letter used primarily in the Vietnamese alphabet, where it represents a falling-rising tone (the hỏi tone) applied to the vowel sound of the letter Y. It is constructed by combining a standard lowercase Y with a diacritical hook placed above the letter, distinguishing it from other tonal variations of Y such as "ỳ" or "ỹ." This character is part of the Latin Extended Additional block and is essential for accurate Vietnamese orthography, particularly in words like "ỷ lại" meaning to rely on.

General Properties

Code Point	U+1EF7
Version Added	1.1
Name	Latin Small Letter Y with Hook Above
Block	Latin Extended Additional
General Category	Lowercase Letter
Canonical Combining Class	Not Reordered
Bidirectional Class	Left To Right
Decomposition Type	Canonical
Decomposition Mapping	"y" U+0079 Latin Small Letter Y "̉" U+0309 Combining Hook Above

Encodings

HTML Decimal Encoding	ỷ
HTML Hex Encoding	ỷ
UTF-8 Encoding	0xE1 0xBB 0xB7
UTF-16 Encoding	0x1EF7
UTF-32 Encoding	0x00001EF7
C/C++/Java Escape	\u1ef7

Unicode Properties

NFC Quick Check	Yes
NFKC Quick Check	Yes
Numeric Type	None
Numeric Value	NaN
Line Break	Alphabetic
Lowercase	Yes
Simple Uppercase Code Point	"Ỷ" U+1EF6 Latin Capital Letter Y with Hook Above
Simple Titlecase Code Point	"Ỷ" U+1EF6 Latin Capital Letter Y with Hook Above
Uppercase Code Point	"Ỷ" U+1EF6 Latin Capital Letter Y with Hook Above
Titlecase Code Point	"Ỷ" U+1EF6 Latin Capital Letter Y with Hook Above
Cased	Yes
Changes When Casemapped	Yes
Changes When Titlecased	Yes
Changes When Uppercased	Yes
Script	Latin
Script Extensions	Latin
Indic Syllabic Category	Other
ID Start	Yes
XID Start	Yes
ID Continue	Yes
XID Continue	Yes
Alphabetic	Yes
Vertical Orientation	Rotated
Grapheme Base	Yes
Grapheme Cluster Break	Other
Word Break	Alphabetic letter
Sentence Break	Lower