Research Findings: Letter name knowledge (LNK) is essential for a good start in learning to read. However, the literature shows conflicting results. Using an associative learning theory framework, the present study examined the influence of child and letter characteristics on LNK in French-speaking children. Children aged 3 to 5–6 years were asked to name the 26 letters of the alphabet printed in uppercase (Study 1) or printed or cursive lowercase (Study 2). Several effects on their naming scores were tested: gender, letters in the first name, letter frequency in print, letter rank in the alphabet, shape similarity between letter cases, and phonological effects related to letter name type. Learning to name uppercase letters relied primarily on knowledge of the personal name letters, whereas learning to name lowercase letters relied heavily on the similarity in shape of these letters to their uppercase counterparts (or for cursive letters, to their lowercase printed analogs). Practice or Policy: Some practical consequences are drawn from the associative learning perspective, such as pairing uppercase and lowercase letters with their name and sound at the same time. In addition, grouping letters according to their shape stability through their case may be an advantageous strategy for teaching letter names.